My wife is exactly like the female half of OhioCouple on the subject. Anything too huge and she will have to turn it down. Painful intercourse would suck. But I dont have a cervix so I cant really tell you what it feels like other than I am told it is rather painful when I hit it. It is her choice as far as I am concerned.
Am I intimidated, jealous, or envious of the male half of another couple overshadows my toothpick? Not at all. We are interested in swinging with people, not from their penises!