Why do I?

[thesonicguy]

Why do I get red and hot when I masturbate?

[Trebor]

Becuase of all the exercise you do. You excercise your right/left arm, that in turn your shoulder, in turn your chest etc.

[Antares]

becuase it is a somewhat strenous activity
very physical
and also your body is going bonkers for the orgasm
like with sex your heartrate goes up and you cant think straight sometimes so... thats why

[saintersin2007]

yer, ur just working mucles and its hard

[Iron]

You get hot because you get sweaty, you get sweaty because your body isn't used to doing whatever motion taking place, making it more of an endurance method, you get red because your heart is pumping more blood at a faster rate while doing so