>>512199014
Because first you need consent (from her father) and be married to her.
Promiscuity destroys entire societies in a few decades. A hard-working man is entitled to a virgin, young and loyal bride.
By taking part in promiscuous casual sex you are robbing other men of their virgin brides just so you can have your 15 minutes of pleasure.
In traditional societies that didn't even have AoC laws they would have lynched you and hung your corpse in public for doing this.