Why do i like the way a mans ?

I m straight, at least i consider myself it, when i watch i like the way they look hard or limp just after , i kinda get turned on by other men's ual essence (his c u m) mixed with my own, race comes into it also, i ve always wanted a three some with a black older couple, something about white/ black essence mixed together that i just adore, i also like bbc and black women's , i don't get why i feel this way, i just want it, i just want to be in the middle of 3 bodies writhing in ual pleasure, 2 of which being black, is this normal? I think i could be mildly bi ual at least when it comes to .