According to AshleyMadison.com, many dads will be spending Father's Day with children they didn't spawn.

Yes, you read that right. The dating site, which targets married people looking to cheat on their spouses, surveyed 102,137 of its philandering female members about whether or not they had ever become pregnant with another man's child and passed the baby off as their husband's.

Nine percent admitted that they had done so, and that their husbands are not aware of it. An additional 16 percent admitted that they're not positive about who fathered one or more of their kids. And among the women in those two groups, 72.4 percent revealed that it's their youngest child whose father is in question.

And that's not all -- the press release also points out that the day after Father's Day is one of the busiest days of the year for the site -- possibly because of these paternity issues.

"Perhaps on a subconscious level, some of these men have come to recognize the family in front of them may not be progeny of their own. In that instance, an affair can become a form of retaliation," site founder Noel Biderman said in a press release.

We're not quite sure what to make of these findings, but we do know one thing: Ashley Madison sure is making a name for itself in the arena of infidelity "research." Click through the slideshow below to test your knowledge of more cheating statistics from the site and elsewhere.

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  • QUESTION: According to an online study, women with what color hair are more likely to cheat?

    <strong>a) Black b) Blonde c) Red d) Brown </strong>

  • ANSWER: Blondes

    Apparently, blondes really do have more fun. According to a recent online survey conducted by Cheaterville.com, a support website for those who've been cheated on,<a href="http://www.cheaterville.com/?page=press&id=299"> a whopping 42 percent of users said female cheaters</a> had blonde hair, while 23 percent cited red hair, 20 percent cited brown and 11 percent cited black. For men, it's brunette spouses you have to worry about. According to the site, <a href="http://www.cheaterville.com/?page=press&id=299">40 percent of male cheaters</a> had brown hair.

  • QUESTION: According to a 2011 study, men are more likely to interrogate their partners about the sexual nature of an affair, while women question this:

    <strong>a) How long the affair lasted b) If the other man or woman was someone they knew c) If the cheater was in love with the other man or woman d) If the cheater initiated the affair </strong>

  • ANSWER: If the cheater was in love with the other man or woman

    According to evolutionary psychologist Barry Kuhle's 2011 study, men who've been cheated on are more likely to grill their partners about the sex itself, while <a href="http://www.huffingtonpost.com/2011/09/15/cheating-study-men-sex-women-love_n_963872.html">women were more likely to ask whether their partner was in love </a>with his mistress. So how did Kuhle and his team go about collecting the observational data for the study? They watched the television show "Cheaters" to <a href="http://www.huffingtonpost.com/2011/09/15/cheating-study-men-sex-women-love_n_963872.html">observe how partners in 75 different affair confrontations</a> reacted.

  • QUESTION: Men who hold this occupation are most likely to cheat, according to a 2012 online survey.

    <strong>a) Lawyers b) Teachers c) IT engineers d) Doctors </strong>

  • ANSWER: IT/Engineer

    What's the typical profile of a cheating husband? In 2012, AshleyMadison.com -- a dating site for married people looking to have affairs -- surveyed 11,453 fathers with accounts on the site and found that <a href="http://www.huffingtonpost.com/2012/06/11/cheating-husband-ashley-madison_n_1582387.html">the largest percentage of would-be cheaters work in the IT/Engineering field</a>. Those in the <a href="http://www.huffingtonpost.com/2012/06/11/cheating-husband-ashley-madison_n_1582387.html">financial industry (8.2 percent) and education (6.5 percent)</a> came in second and third, respectively.

  • According to recent studies, what percentage of women have had affairs?

    <strong>a) 30-35 percent b) 15-20 percent c) 5-10 percent d) 2-5 percent </strong>

  • ANSWER: 15-20 percent

    Fifteen to 20 percent of women have had affairs, <a href="http://blogs.psychcentral.com/sex/2012/01/men-and-women-more-alike-than-different-in-relationship-fidelity/">according to studies from Indiana University and Manchester Metropolitan University</a>, while a comparative 20-25 percent of men have cheated on their partners.

  • According to an online survey, mothers who cheat had been married for an average of this many years:

    <strong>a) One year b) Five years or less c) 16 years or more d) 25 years or more </strong>

  • ANSWER: Five years or less

    In May 2012, infidelity-based matchmaking site Ashleymadison.com polled 2,865 of their married female members and found that the typical cheating married woman was <a href="http://www.businessinsider.com/typical-cheating-mom-ashley-madison-2012-5?comments=all#comment-4fad4fa86bb3f71c7a000015">married for five years or less, in her 30s, and had a daughter under three years old</a>.

  • A recent online survey showed that 66 percent of Americans believe that people cheat on their spouses while...

    <strong>a) At the office b) In Las Vegas c) At work conferences and trade shows c) At bachelor and bachelorette parties </strong>

  • ANSWER: Work Conferences And Trade Shows

    Yep, a surprising <a href="http://www.huffingtonpost.com/2012/08/20/cheating-at-work_n_1812041.html">66 percent of Americans believe that people cheat on their spouses at work conferences and trade shows</a>, according to an August 2012 online survey conducted on behalf of ON24, a webcasting and virtual events company.

  • QUESTION: Infidelity-based matchmaking site AshleyMadison.com has recently seen an influx of married women signing up for its services on the day after this holiday.

    <strong>a) Valentine's Day b) New Year's c) Mother's Day d) Christmas </strong>

  • Answer: Mother's Day

    For the past four years, AshleyMadison.com<a href="http://www.huffingtonpost.com/2012/04/26/mothers-day-2012_n_1450803.html"> claims to have seen a rush of married women signing up</a> for its services the day after Mother's Day. In fact, according to the site's founder, Noel Biderman, more married women sign up for the site on that <a href="http://www.huffingtonpost.com/2012/04/26/mothers-day-2012_n_1450803.html">day than on any other day of the year</a>. Why? Biderman said he thinks the women feel especially under-appreciated on Mother's Day. "If that day comes to pass, and once again what [women] experience is a lack of appreciation, affection and respect, that is when the idea of taking on a potential lover takes full form," he said.

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