I just waxed a guy last night, back/chest/stomach/and arms. This guy was kinda big, but on his way to losing weight. Something to remember as with any part of the body is the skin on their side where the hair grows towards the back. It's a bit soft around there and you must pull taught or you'll get bruising. Depending on his size, might be easier to have him on his side to those areas. I have used the stripless wax before, and last night I used the strips and the strips are so much faster! It was amazing how much faster it went! One more thing....be sure to do the towel in the pants and drop the waistband a little lower so you don't get the fuzzy peek-a-boos, lol. Might have him place the towel in, but you determnine how low it needs to be. I'm sure you already know this, but even I forget the little things sometimes.