My games use a system to solve everything the system covers, so not sex, but everything else is done as the book tells to. Of course I house rule sometimes, but, expect the same adherence to mechanics as your average D&D/Pathfinder/GURPs game.
Surprisingly, not very rapey. Only two out of 5 players are into that. It can happen sometimes with the others, provided they feel into it in the moment. It's common that, if a TPK happen, instead of dead they are captured and those willing end up being raped. Sometimes, but seldomly, enemies use sex as a weapon, like dazzling aphrodisiacs, but that's a vast minority. Hasnt happened more than six times in four years. Usually combat is very well separated from sex parts.
Since I run the NPCs, i get more action than most players, but they do get action between themselves a lot too. When something doesnt involve all of them, though, we usually dont use a lot of time with details, we dont fade to black, but we brush over. In moments where something is public though, or involving all the party, we run it in details.
Yes, that has happened. They told it to me in private a couple times they weren't comfortable with the situation or where it was heading. One of the times I failed to stir it off the course quick enough and the player was a bit upset for a while but we talked and solved things. The second time I handled it better, and quickly removed the issue bits (player wasnt entirely comfortable with losing 'all' control of the action, so instead of fully tied, his legs were freed, for example. That alone was enough to make him much more comfortable.)
Yes. Conflict happened often. Jealousy is a thing in this sort of game, though it takes a very particular form. Specially for example, if a player digs a particular NPC/other player, but there are more than just that player interested. This can lead to some arguments and almost turned into serious infighting. But fortunately, that also resolved itself quickly.
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