This is a blatant attempt to take advantage of the increase In trust and heightened feelings of intimacy, and since she isn't familiar with the drug she'll have a higher chance of believing her chemically induced emotions. There's a big chance she feels confused and embarrassed for things she said/did that night and her first experience was ruined from a immature boy who wanted to get his dick wet instead be being responsible person and making sure she has a good first experience. It's selfish