Depends on your prejudices. If you think it makes you less of a man to let a man do it to you (though it must be just as bad if a woman does it) don't do it.
From my experience there is no comparison between a bit of rubber or plastic going up there and real human flesh.
Swinging is addictive, as is that feeling of being not in full control of things, kind of a risky unpredictability so you have no idea how things will pan out (but hopefully amongst people who will keep you safe).
Boundaries being pushed, many times, things getting out of hand mostly within...