Confessions: Cosmo readers share their most shocking stories and steamiest secrets.

Sex Tutorial

"My boyfriend was having trouble studying for a test, so in order to motivate him, I made up a seductive studying technique: For every three questions he answered correctly, I stripped off an article of clothing. Unfortunately, by the time rd taken off all my clothes, he'd lost his ability to concentrate on studying. I was seated, wearing nothing, and covering myself with his study book when the door to his room opened and his older sister barged in. She saw me sitting there naked, holding his book with his hands on my thighs, and her eyes got huge. She stood there shocked for a second and then just turned and left."

--Corinne, 20

A Saucy Number

"I was at the grocery store when I reached for a jar of marinara sauce and it fell, shattering on the floor. Red sauce spewed all over the tiles and shelves ... and spackled my white jeans with red splotches. An employee saw me, rushed to the intercom, and yelled 'Cleanup on aisle seven!' In my attempt to make a getaway from the situation without attracting attention, I slipped on the sauce and fell in a huge pool of it.

"I walked out to the parking lot with a red stain on my backside and came face-to-face with my friend's brother, who I have a major crush on. I ran straight to my car and drove away without saying a word."

--Ingrid, 25