Retarded guy pulled a hot girl. The fuck is going on?

There was this guy I used to go to daycare with who was low IQ (seemed retarded). He had a helper and was weird as fuck, though people still liked him. I saw him at the club tonight; we chatted a bit and exchanged numbers. He was cooler and had definitely grown up and chilled out a bit. He was with 2 chicks, one of which he met off tinder. She was my friends ex girlfriend, weirdly enough. Despite becoming more normal, he still seemed pretty weird, and was definitely the same person.

I had talked to this sexy italian girl earlier and exchanged numbers with her (was bouncing around the venue and was with other chicks). She was attractive, but also had the slight vibe of "weird/secret slut". Before closing, I noticed she was dancing with this guy on the dance floor. Then they went outside holding hands. I decided to follow out of disbelief: there was no way this could be fucking happening. She was with like 4 friends and their groups intermingled a bit. I went in and chatted to them a bit to figure out the dynamic of what was going on (apparently the chicks didn't like me, not exactly sure why). He somehow managed to figure out logistics and fucking pulled her + her friend about 20 minutes later.

I spent like 30 minutes talking to my friend explaining what happened and how I didnt understand it. Last minute this 19 y/o english girl walks by and I pull her straight to my house to "meet my parents" (they're english too).

After we fucked she kept asking me what was wrong, because I was staring straight at the wall having an existential crisis over what the fuck I just witnessed: a retarded motherfucker pulled a hot girl.