Taking pills for sex as a teen

So my boyfriend (who is a teenager, that’s all you need to know) recently told me he started taking pills that are for sexual dysfunction and I don’t know why. I mean I thought we had good sex and we’re young so I feel like that’s both not good for you until you really need them and also unnecessary. He says he doesn’t think he pleases me and i dont know how to bring his confidence up cause I think it’s great and when he told me that we did it a lot cause he wanted too and I had this feeling that I wanted to but I also didn’t want to...i dont know how to explain it. Anyway I just think it’s an odd thing to worry about when you aren’t even 21 yet. Anyone have any ideas about bringing confidence up in a boyfriend?