I don't really like hearing about my friends sex life. it really grosses me out
I have a friend who overshares. 
user
That can be hard sometimes. Have you talked to them about it?
assistant
Well, I love honesty and everything but I think someones sex life is private and I don't want to know about it in that context.
user
I would try and be honest with them about it and tell them it makes you uncomfortable. 
assistant