We don't make it a habit, just do it when we really need it.
My friend Louis and me, we work out with free weights in my basement after school most every day. We are alone in the house because my mother is at work. We always exercise just in our underpants and we can see when either of us has a hard. We joke about it a lot and sometimes we wrestle around and if that gets one of us hard and shaking the other one makes fun of it so we try not to. We also give each other body rubdowns after the work out, just on the back and legs and sometimes the chest. We use olive oil because we heard that Greek athletes used to do that to limber themselves up.
Most of the time we go into the shower after exercising and we jerk ourselves off. It is a small shower stall in the basement we go in together so it is very close in there. Only sometimes when one of us really needs it we will do each other. We don't do that a lot maybe only about twice or three times a month and it has to be important because neither of us wants it to be a habit that we get hooked on. When he really needs it like when he had a bad day and flunked a test or got dissed by some girl he'll let me know he needs it and I get behind him in the shower and press against him and reach around and stroke his dick like as if I was doing my own, and at the same time I play with his nipples because he has good development of his chest from the weights and they feel nice.
When I need it he does the same thing but with his free hand he likes to put his fingers in my mouth. I don't know why that feels good to him. Anyway we only do this once in a while. Lately we both admitted that we were thinking about it a lot almost every time we jerk off but still I don't think we will stop, it is very relaxing when you really need it and I don't think it will do any harm.