What's wrong with sex without all the other details?

I meet all these girls all the time and all they do is make everything so damn complicated by overthinking things and nothing ever happens. I want a relationship, but this is what happens every time. Sometimes i'm like damn lets just have some good sex and quit making life so complicated. I never even get to the point of having sex with any of these girls. They burn off after a month or so.

What's wrong with sex without all the other details?
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