Or maybe he’s just 17. Like, sure lots of people are fucking by then, but maybe he wants to do it with someone he’s emotionally attached to, and hasn’t found someone he’s compatible with and mutually interested in.
Or maybe just ace.
Like, it’s not like it’s weird to not have had sex before 17. When I was 17 I was very much bisexual (still am), but I wouldn’t have fucked someone that my friends just payed to fuck me.