Guys flexing muscles while getting off

It seems to me that in my experience this is quite normal. One thing that is fun to try and quite pleasurable is to pick a time when you will not be disturbed and will have plenty of time to do. Lay back in complete silence and darkness and relax completely and think of a scenario that would be hot. Don't touch your penis just play through the scenario in your head as you stimulate your nipples and become erect. Once you are completely erect then using your hand stimulate your penis and continue to fantasize your scenario. Do nit allow yourself to tense any muscles just keep masturbating and fantisizing. When you feel the need to tense up dont allow yourself to. Before you know it you will be dancing on the edge of what will be one of the strongest orgasm you have ever encountered. You have 2 choices here. Without tensing up you can continue to jack yourself over the edge or carefully maintain the feelings you are in the midst of. If you choose not to instantly push yourself over just carefully vary the stimulation levels and should be able to maintain the level of orgasmic bliss your in. Then when you do push yourself over it is fantastic but even when you cum do not tense up.