Wow. Given that sex is frequently funny, and I've had rather a lot of sex, you'd think that I'd have loads of stories. Oddly, though, I'm drawing a bit of a blank. But here; have a story that's almost on topic:
One night -- I was in my early 20s at the time -- my then-boyfriend, my mother, and I were playing a game of Scrabble. When my boyfriend's turn came around at one point, he spelled out the word "queef".
My mother sort of smirked. But I'd never heard the word before in my life, so I said, "Is that even a word? What the heck is a queef?!"
And my boyfriend oh-so-tactfully replied, "Well, you remember that noise that happened last night... ?"
My mother died laughing. Meanwhile, I just wanted to die. XD