That will be a nope (no customizing his rims, sorry).
Concerning the M/M, maybe? I'm not sure, I haven't played the game long enough or tried all the choices. Considering you can raise affection with almost all of the in game characters (male and female) I suspect you can get some gay action somewhere along the road (but don't know if that's a thing now or will be in future versions). Currently it seems it's mostly mother/sister incest, M/F and F/F as I have seen ingame.