#4 Waiting is a great form of foreplay. You know how it is when you watch a romantic TV show and you want the two characters to just get it on? If they do that within the first few episodes, there’s not much else to look forward to.
It’s the same with first night sex. Sexual tension can build up and cause a lot of excitement. You wait for signs as you get to know each other better.
You flirt and make eyes at each other as you subtly touch. When all that tension has built up, you explode into a frenzy of passion. But if there’s not a lot of anticipation for sex, the potential to have an explosion of passion just fizzles out.