There’s No Needless Anticipation and Build Up
While courtship can be fun for it’s own sake and might lead to better consummation of a relationship, a lot of time it’s a big drag, because you’re not actually sure if that consummation is ever going to happen. Having sex on the first date greatly reduces the anxiety engendered by dating and all the trivial concerns that go along with it. Furthermore, the feeling of anticipation occasioned by courtship is often based on elaborate game play and careful, selective displays of both affection and indifference. This kind of sucks, and if you bone on the first date you hopefully circumnavigate a lot of that crap.