Pls is it possible for a man that was injected with sleeping pill to have sex with a woman without him (the man) knows?? Can such a sleeping man erect while asleep??

I think so, because this morning I woke up with an erected dlck. I had to beg it to calm down because it’s Sunday morning. I don’t know what I was thinking while asleep that got it so aggravated and ready to tear my boxers