My [22F] GF flashed her butthole/bush at a pool party and I [21M] almost came

One time my friend threw a pool party, in which he also rented a massive inflatable water slide for the day. My girlfriend went down the slide in her loose purple bikini, and when she got up her bikini bottoms had completely shifted, leaving her bush and right asscheek on display. All of my friends saw her and none of them said a word, choosing just to sit and watch her embarrass herself.

She walked around for about an hour like this completely unaware of her ditzy display. Later we ordered some pizzas and all made our way to his back deck, which is where the highlight of the day came from.

My girlfriend dropped her phone through a crack in the floor, and got on all 4s to retrieve it. She struggled to find it and kept trying different angles to locate it, and her ass went up higher and higher and she tried to get it. Her bikini bottoms were shifting more and more, revealing more and more of her cheeks and crack.

She ended up going face down ass up , and she completely arched her back. Her asshole was on full display and I saw all of my friends mouth drops. She started rocking back and forth and it almost looked like her asshole was smiling at them. To this day my friends refer to her as having “the ass seen round the world”