_postsecret_
A favourite community. Someone posts a secret and people reply with their answers. I found this while I was reading back through _postsecret_ :
SECRET: What is the biggest, fattest, ugliest, most potentially-devestating secret you've ever kept from your significant other (previous/present/etc). Why did you hide it? Did you finally come clean/get caught?
ANSWER: He's my Aiden and his best friend is my Mr. Big.
And because I'm tragic, that made me want to cry.