By your logic if MC had 2 penises would it be also one to many?
Its same npc but simply cloned and no not cloned as in a whole other person but an extension to our NPC that can make the other self disappear and also remember the fact that the other clone can ejaculate and feel what the MC feels so there arent 2 different beings .
For me, two penises on my body is one too many, because I currently just have the one. Never mind the body horror element if I just suddenly grew an extra one. It wouldn't matter if I had full control of it and could feel everything that happened to it. That's a hard pass.
Similarly, I wouldn't want there to be another me. At least as far as sex is concerned. It doesn't matter if the second penis on my body or has it's own. Someone a while back mentioned Jamie Maddox, The Multiple Man, who actually has been a favorite of mine well back into his X-Force days. Although I also know enough about some of the horribly bad consequences or implications of his powers that I wouldn't really want them. I definitely wouldn't want to be able to create a duplicate so that I could have a threesome with them and some woman. Doesn't matter if I am telepathically in control of the clone, or we can re-integrate memories or something. Just... no. It's a weird enough proposition where it would be enough to kill any number of boners I had across multiple bodies.
Now, if somehow the MC had brought back a version of one of the love interests from the last loop, and they wanted to get in on the fun with another version of themselves, that could have been interesting. It would have been weird, but not in a way that drives people away.