Recently got high one night with one of my friends and was hanging out. He started chatting about his single adventures and started showing me pictures of some of the girls he hooked up with whole telling me stories about them. After a while he said "well now show me yours then", and I was unsure what he meant as I've been dating my girlfriend for a while, and he's met her and knows I'm loyal. But he told me he meant pics of my girlfriend. I asked why and he said he hasn't seen her in photos before as she doesn't post and hasn't seen her on holiday or going out. He told me it was only fair, so I showed him some of my girl, and was just making mild comments like she's always had flirty eyes or juicy lips. We moved back onto him talking about some of his more adventurous sexual instances and he showed me things of some of the girls he'd gotten with in bikinis and stuff, he had been pretty successful. Then he said it was my turn, and if I didn't it would ruin the night, and if its just bikini stuff it's what she would wear outside anyway. So I shown him some stuff, but all of a sudden he just grabbed my phone out my hand and wasn't giving it back and was telling me to calm down he was just looking. But he started swiping through to stuff of her in lingerie and twerking and sexual vids, and was making comments about how bubbly her ass was, and how she knew what she was doing with her hips. He even started sending them to his own phone. After a while I managed to snatch my phone back but safe to say it had put a dampener on the rest of the night and was very uncomfortable going forward.