Last night I (28F) had a few drinks in the city and ended up ditching my friends to look for some cock. I met a man (50ish M) at another bar and started chatting with him. He was good looking for his age despite being quite heavy set. He invited me back to his hotel room. Before I knew it I was kneeling on the floor sucking his cock while he sat on the lounge. I was circling his head with my tongue and he kept telling me he was about to cum when suddenly he put his legs back and grabbed my hair and forced my face into his arse. He was a big man and at first I felt very gross and degraded and wanted to leave but I licked and sucked his asshole for him. He kept insisting I get my tongue in deeper and I felt so gross but started to enjoy it. He kept telling me I was a good girl and his little slut and I found it encouraging. I left feeling ashamed but also extremely turned on. Thinking about it today.