Guy chose a girl who smokes weed and crack, poses nude, and is just crude over me... can a guy explain to me why?

So I wanted to have this fling with a guy because he’s moving away at the end of summer but we dated a little bit before and he told me he’s moving and can’t handle something serious as he doesn’t want commitment when he is 70% sure to move for his career. He may not move though, so he wanted to keep things open with me. We both are compatible and our sex was great. We had fun together and acknowledged this.

Now he’s hooking up with a girl who does crack and smokes weed, is just really tacky (badly colored rainbow hair, broken out from drug use, not that attractive but she has big boobs, yellow teeth, obnoxious personality like she’s always strung out)... and I’m just confused? Like I take care of myself a ton, am educated. He and I seemed like a good pair. I have a very nice body and I’m complimented for my looks often. I’m not trying to sound stuck up here but I am really confused why he’d choose to hook up with a girl like that instead of a summer fling with me? Do guys not have any standards for hookups?
Updates
+1 y
Sorry correction: it’s not crack, it’s actually meth
Guy chose a girl who smokes weed and crack, poses nude, and is just crude over me... can a guy explain to me why?
Post Opinion