listen it does matter, the aids virus (before it was changed to that ) was called GRIDS ( Gay Related Immune Deficiency Syndrome) this was a disease found only amongst homosexuals. Only they were found with it. it then spread to other because of cheater brought it to their spouses.
There a reason why the sex organs self-clean and the places meant for excrement's doesn't, its not for sex. its for refuse ( germs are there)
Don't let people lie to you about "love", if this is a real thing that is provable by science, then science will have to explain other attractions people have in nature such as people who are sexually attracted to kids, dead bodies, family members, material possessions and animals.
It's a spiritual disorder then it affects the mind ( I'm a Christian so I see it as spiritual, then mental then it moves to physical ) because you can train the mind to adapt to whatever you want it to, so what's inside is what attracts you and then the mind sends signals to the body to fulfill the "heart's desire"