I've been doing research on the subject just cus, and I've only really found stuff on the use of brothels and prostitutes, but there is little reference of how serious personal pre marital sex was. At varying levels how common was it for two bored teenagers to steal away from work in the field for an hour for a bit of fun behind the abandoned mill? And same at higher levels too, would you find this happening between the betrothed or in love sons and daughters of nobles? As well as sex with the same gender, as there are always rumors about this for kings and queens but we never go into these things between teenagers? I'm just looking for general answers.
There are three answers by /u/sunagainstgold that you may find useful:
How were people not constantly impregnated during the Middle Ages/Renaissance?
Do we have any evidence for casual sex relationships during the Middle Ages/Renaissance period?