Promiscuity is only bad if you don't make your intentions known to the person you are intimate with; or you do something that could harm your partner, unless they have agreed to it.
6/ I might as well be a nun for all I get....lol...that's what slash fic is for.
8/ yes so long as all involved know what's happening.
9/ my best ever "relationship" is with my "best mate". We said 'no sex' years ago and 5 years on it's till the best. We have even been on holiday together.
10/ no, just no