Let's just put aside the chemicals that are released in your body during sex for a second and just look at it objectively. Without the euphoria that you're biologically programmed to feel during sex, you probably would have no interest in it. Sex would literally be like hooking up with someone you're not attracted to.

But because you're basically a slave to biology, it doesn't seem like it's stupid because you can't look at it objectively.

Also, in the pursuit of trying to get sex, a lot of guys end up doing and saying a lot of dumb things because when most guys are trying to get laid, all reason goes out the window, and women know this and so they use it to their advantage.

And because of sex, most people don't really know what love is because they're stuck at the instinctive level where their lives basically revolve around sex and pleasure, and they never go beyond it.