Belive it or not, I'm writing this post while talking on the phone to my mom.
As sexually open as I am, nothing irks me more than my mother talking about the sex she's having (or, to be exact, not having) with my dad.
Mom, I don't wanna hear about E.D., about the fact you haven't had any in a while. I'm happy I no longer live at home, sleeping in the bedroom right under yours and hearing you having sex once in a while. I'm still drinking to try to forget that and it's been over 20 years.
I used to tease my ex about his parents having sex, in very kinky ways and hinted they obviously belonged to a swingers club or two. He was terribly disgusted by the idea and it was hard trying to get "things going" right after I said something like that.
It was funny thought. :)