I'm not sure if this is the right category for this but it is the closest I could find that fits my experience. It started when I was 15 and continued on past 18 and for some years afterward.

When I was 15 I started to have an affair with one of my teachers. She was sexy and looked a lot younger than her 42 years. I was of course a typical horny teenage boy who would fuck pretty much anything that couldn't outrun me. I was pretty much average in the looks dept as well. Miss Davenport was my English teacher and started to pay a lot more attention to me than the other kids. By October she had invited me back to her place for some "studying." By Thanksgiving we were lovers. I turned 16 in December and in January Miss Davenport quit her teaching job. At first I was devastated but then she explained it was so we could continue our affair more safely. Some weeks later she came to me with exciting news. Neither of us really looked into it until then but after some enquiry she learned that if I became an emancipated minor we could get married right away. We contrived a lame excuse for my emancipation that the judge bought and only a few weeks later that spring we got married.

That's when things changed. All of a sudden Miss Davenport became Miss Bitch. I suddenly realized I had made a mistake. I let my dick do my thinking for me but now it was too late. In our state at that time if a couple got divorced the husband was required by law to support the ex wife until she remarried. Divorce was out of the question. I would have to quit high school and get a job. I was seriously thinking about just running away.

Then after one particularly nasty fight she stormed off into the night and I almost thought she wouldn't come back. But then a few hours later, without explanation all of a sudden she was really nice. She offered me a nice long relaxing blow job as amends and I of course being a horny teenager accepted. She had me lay back on the sofa naked and she got started. Within minutes she was doing something she never did before. She licked my asshole. I don't mean she just gave it a few quick licks. I mean she was tongue kissing my asshole. Her face was buried between my ass cheeks and she was drilling my ass with her tongue which was a bit longer than average to begin with. It was the most awesome sensation I ever experienced. She just licked and licked and went on for hours. I didn't want her to ever stop and she didn't seem to want to stop either though after a few hours she did. We went to bed both exhausted and fell asleep. I woke up the next day to her licking my ass again.

She offered no explanation as to her new found interest in licking my colon clean and I wasn't going to question her choice of new hobbies either.

Oddly, she has continued to be a bitch through out our marriage. She is always picking fights and I have never figured out why. In fact it continues almost daily. But pretty much by 7pm every night she loses interest in fighting and just flips 180 degrees and yanks down my pants and shoves her tongue up my ass and eats it out for a few hours, usually tiring around midnight.

So I am 36 now and she is 63 and to this day she still spends hours every day licking my ass. I have long since stopped trying to figure my wife out. I have pretty much grown numb to her provocations during the day and just luxuriate every night in the wonderful sensation of my bitch, er, I mean wife worshiping my anus with that magical tongue of hers.