I see sex simply as the means by which animals reproduce.
I have no desire for a baby, thus my sex drive is zero.
Relationships are for people who want to get emotionally attached and make shit complicated. If I ever want a baby, I'll have sex with someone until I concieve a child, and then I'll never talk to them again. However, I doubt I'll ever want a child and thus I'll likely die a virgin.
I tried having a relationship to stave off the lonliness that tends to come with life, and the only thing I got out of it was a person who thought he needed to be attached to me at all times and then turned into someone that I just generally didn't want to be around. Friends are better than lovers any day.
Perhaps I'm just a weird person...