I think that all of us go through the feelings of reaching a certain age and suddenly realising that our younger life has now gone and we are moving on to a different time warp.
We look in the mirror and and dont always like what we see Are we still attractive to the opposite sex? Would we take up the offer of an affair if we met someone? Are we bored with our partner? Has our sex life gone stale? How exciting would it be to see another person without your partner knowing? Its last chance parade, and its frightening. We either get over it and make the most of what we have, or join the other side that goes out there and lives the dream. Which unfortunatly means the devastation of the marriage. If you do regret what you have done and try to make your marriage work its never the same. The trust has gone and can never be replaced. Its a no win situation.