You're probably not this close with your coworkers.
Heidi Klum and fellow "Project Runway" judge Zac Posen seem really comfortable with each other, judging from the sexy Instagram photo Klum shared July 31. In the shot, Klum is in nothing but her underwear as Posen covers her bare breasts with his hand:
The 41-year-old wrote, "@zacposen I need something to wear for tonight's @projectrunway @lifetimetv."
NSFW, unless you're Heidi Klum.
Aside from her standard bikini photos, the supermodel recently stripped down to promote amfAR's new tote bag, designed by Jean Paul Gaultier. All proceeds from the tote will go toward AIDS awareness and research.