We have one male friend that loves anal, and talks about it alot. Really a turn-off for me. I once stopped him mid-story and told him that I'd never be interested unless he was the size of my pinkie.

He jumped up and said, "Well, let's go." I wasn't giving an invitation, but apparently he is that small (I had no clue).
It's just not my cup of tea, but I have no problem with hubby participating in DP, if that's what the lady wants (with protection and care).
Mrs. D