So there are a lot of time my bf and I have sex and it’s getting really hot and heavy... and then he just doesn’t cum 🤷‍♀️ he says it’s because he’s too tired or we’ve already done it a few times that day (but also sometimes it could be the first in days..), but idk- like is that normal or happen with anyone else? He’s got great control and our sessions last around 15-20 mins but then sometimes he just looses it..