I'm 36 and have been married for 8 years. I recently got my doctorate and work at a local university. I love my husband, but he is a blue-collar type that works in construction. He's great, but there are some things that we simply can't discuss, because he never went to college. Sometimes our conversations are a little lacking in substance.
I've been blessed to have colleagues who are close friends. Lately I've been telling my husband that I'm going to the library for research, when in fact I've been going to small gatherings at the houses of my coworkers. It is so fun to talk about what we've been researching, have a few drinks, and relax. It makes me feel alive. It's usually just five or six of us, but we have also been having sex at most of these meetups. It's totally casual sex with singles and couples. There is nothing like screwing people who are really smart. It's such a turn-on, and not something that I experience with my husband.
My husband would leave me if he found out, and this scares the shit out of me. I've been trying to regain my senses and stop cheating, but it is hard. Having group sex with hot, sexy, smart people is addictive.