and what is it like?...

I'm pretty sure I know what it feels like as a dude, and that women don't get much out of it physically,or so I hear, but is it uncomfortable and more importantly is it repulsive to women who do it? Personally I don't like the idea of putting something sensitive in a place like that, but since it's not with a real body part; I imagine that it's different. Still, I wonder if that person would think that their male partner is nasty.