You've seen her shopping, wearing a bikini and now she's doing the ultimate womanly thing -- faking an orgasm!

Caitlyn Jenner is really going out on a limb for an upcoming episode of I Am Cait. The former Olympian, her gal pal Candis Cayne and their crew visit a gender-free orgasm workshop -- and they are instructed to fake orgasms in their group session.

At one point the instructor says to the gender-bending crew: "A gender-free orgasm means an orgasm without genitals."

The whole thing is 50 shades of awkward!

We guess now that Caitlyn is a woman -- she's got to learn the important stuff!