Why Chrissy Teigen Hates Underwear: John Legend Fiance Opens Up To Joan Rivers About Never Wearing Panties [VIDEO]

Chrissy Teigen spoke to Joan Rivers about why she doesn't wear underwear. The Sports Illustrated model revealed a little too much to the hosts of E!'s "Fashion Police" while she was visiting the set on Friday.

Chrissy arrived on set wearing a super short, long-sleeve nude dress. As she struggled to cross her legs while she sat down, Chrissy realized that she probably should have "tested [wearing the dress on set] before" the actual taping took place, HollywoodLife.com reports.

"I didn't realize sitting would be this bad," she said.

When Rivers asked Teigen if she was currently wearing panties, the model, 27, replied in the negative, Us Weekly reports.

"I [just] got a nice view," George Kotsiopoulos quipped.

When Joan asked the model why she doesn't wear any panties, her answer was simple and to the point - she "just doesn't like it."

Then, in an awkwardly revealing moment, Joan Rivers asked Chrissy what she does during her "time of the month."

John Legend's fiancé then gave some "fashion tips" and claimed that, "you just tuck the string in your butt crack."

According to Hollywood Life, Chrissy also told the panel that as a model, especially one that wears no panties, she usually "trims the string."

Poor Kotsiopoulos seemed traumatized, and begged the woman to stop talking about it.

"Oh, T.M.I.! T.M.I.! Stop! Stop it!" he said, as Teigen began to explain what dancers in rap videos do in such situations, Us Weekly reports.

"We're still talking about this?! Stop it!" he said again later.

Watch Chrissy's revealing interview (and dress) here: