No offense, but that's easy for you to say if you aren't promiscuous, if you don't go through the feelings of guilt and shame that come with having a sex drive that's supposedly too active, that society tells you to be ashamed of.
Let's "live and let live". Let's all accept each other's attitude towards sex. But what you're saying is kind of like someone saying "I don't see colour", when racism is so fucking glaring that you would have to be blind to be colour blind.
I refuse to "live and let live" with intolerance. To do so is injustice.
Well I think you need to work on why you feel such guilt and shame just because some people in society tell you what you're doing is wrong. Wrong for whom? It's not wrong for
you. Nobody is asking them to live that way so what's their problem? So you have a high sex drive - well that's your business and nobody else's as to how you deal with those urges, whether that be by seeking many partners or having lots of sex with just one person. I don't think you're a lesser person whichever way you choose and to those who would call you for it I say fuck 'em. I wouldn't even give them a second thought. If you're a honest, truthful, caring and thoughtful person in every other respect then that surely trumps what kind of sex life you have imo.
It seems to me that you do have issues in your own mind in accepting the way you are. You say you do, at times, ask yourself why you feel the way you do but what happens next? You bring to mind your upbringing and let that influence your thoughts. If you can dismiss Islam as nonsense then you can do the same for cultural taboos and dismiss them to the dustbin too. You don't have to do or live any lifestyle you're not happy with, if you don't feel comfortable being a slut then don't be one, nobody is forcing you to be one, and likewise if you accept yourself for whatever label you wish to put on it then carry on and indeed live and let live. Why battle with yourself about it when clearly interferring others won't hesitate to do that for you?
ETA: I see you've now edited your post abood but what I say above still stands anyway.