British rugby hunk Ben Cohen has never been shy about stripping down for a good cause -- and from the looks of it, his soon-to-be-released 2013 calendar could be his steamiest effort yet.

In this behind-the-scenes video, the 33-year-old athlete and anti-bullying advocate strips to his underwear (from his custom-designed line) before a sweaty workout while a photographer snaps away. Swoon!

"It’s about being a champion on the field and off the field, and that’s where a lot of sportsmen really let themselves down," Cohen, who is straight and married with twin daughters, told The Huffington Post last month. "If men find me attractive, that’s fair enough. I’m very comfortable in my sexuality, and I’m honored and flattered by it—it’s lovely to hear."

Proceeds from the calendar go to the Ben Cohen StandUp Foundation, which is focused on combating homophobia and anti-LGBT bullying.

Check out Ben modeling underwear and other exclusive StandUp clothing below:

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