"Oh! Maybe doggie paddled?" Chrissy smiled. "Not full on swam."
Her fellow guest, Kristin Chenoweth, quickly followed up with the best response ever.
"Breast stroke!" Chenoweth laughed.
Chrissy is far from the only celeb who Cohen has asked the "lady pond" question to over the years -- last October, actress Olivia Wilde coyly replied, "I appreciate all people," and in April 2014, Cameron Diaz was much more blunt.
ET exclusively caught up with Cohen last week to talk about his popular late night Bravo show -- which has become famous for the incredibly candid responses he's able to get out of celebrities -- when he revealed the one time he thought he actually went too far. The 47-year-old host said that asking Oprah Winfrey whether she'd ever been with a woman before was his most fearful moment.
"I was like, 'Oh my God! I think I've just ruined everything!'" Cohen admitted.