A Japanese Movie Night
When a group of 3 or more same-sex people get together to scream at a screen full of naked people doing weird stuff.
My friends and I watched 4 hours of hentai and I still don't know why the guy had 10 arms.
My cousin texted me: 'I'm watching hentai with my boyfriends. I'm not coming home.'
At the sleepover, we watched so much hentai, the neighbor called the cops.