I am 45 and my neighbor is 44. We jack off together all the time. We are both happily married too. It all started about a year ago one day when we were talking about sex, being horny, and jacking off. We both admitted we did it all the time. One comment lead to another and we found ourselves standing in my kitchen with our pants around our ankles jacking off together.
We do it whenever we are both home from our jobs during the day or whenever our wives go shopping together. I find it quite enjoyable to sit on the couch beside him, both of us naked from the waist down, and see both our our dicks exposed and hard. As we jack ourselves we tell each other secret things about our wives like how hairy their pussies are, what their boobs and nipples look like, what kinky things they do while having sex, etc. It's fun.
We haven't touched each other in any way while we've jacked off but we watch each other. I am kind of close to asking him how he would feel about jacking each other off. I'm thinking he would be OK with it. It always feel better when someone else jacks you off!