What are the best and worst oral sex you've ever received?
Best: she was a formally trained mezzo soprano opera singer. She did things with her tongue I did not believe we're possible. I swear that at one point I was levitating like Linda Blair in The Exorcist, such was the absolute ecstasy I was experiencing.
Worst: my ex wife. She was an enthusiastic giver or receiver and had a small mouth to boot. Oral sex was always a chore and it was rarely used as a pre-cursor to sex.