Is my husband gay ????

My husband gets turned on by me but I've noticed that he likes to play with my butt more then my clitrus area and he also wants me to play with his butt I mean he doesnt always ask for it but I feel like I have to to get him going because he always seems to injoy that alot more also when he plays with my butt I feel like he likes the smell like he's trying to get that ass smell?? I don't mind being a freak in the sheets but I also don't want to deprive myself and him of what we want in life also my question is does anyone else go throw the same thing or if theres a man out there is it normal for men to just want all types of sex but not be gay ?