My girlfriend was having a rough day (30yo average build red hair) so after she got out of the shower I took her to bed and started eating her out. After ten minutes and an orgasm from her later I stop. She said thank you, put her legs down and that's when I decided to just do something crazy. I picked her legs up pulled her ass up as high as I could and just dove my tongue straight into her asshole. She flopped back on the bed and screamed "I can't believe you are doing that!" At which point she started moaning well I eat out her asshole for another 10 minutes. Once I thought I was done I helped her get her pants back on, but by the time she was standing up I was already pulling her pants down and shoving my tongue back up her asshole for one last taste fearing I'd never get the courage to do it again I may as well live it up this once. After a few seconds I stopped and pulled her pants back up. She walked over to the bathroom to wash her hands, at which point I put my hands on her butt and she asked "Want another taste?" With that I pulled her pants back down in front of the sink dropped to my knees on the tile floor and eat her asshole out like crazy well I undid my pants and started masturbating. I came the hardest I've cum in months with my tongue as deep up her tight little asshole as it would good.

It was my first time eating an asshole, and her first time ever having her asshole eaten. It was very much filled with lust and excitement on both sides.