How to masturbate anywhere without wetting?

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i posted this question b4 but u didnt understand what i meant. I just want to know how i can masturbate anywhere without wetting my clothes... i c a lot of my friends that touch and play with their cocks at school and everywhere (all boys do that) i dunno why... i wanna know how they can orgasm without wetting their clothes and without going to the bathroom or bathing... pls help

First off, the other boys at school should not be playing with their cocks in public. Masturbation is something that should be done in privacy, not in class or in school.

Anyway, chances are they either don't masturbate to orgasm or ejaculation (just playing with themselves a little to get aroused, but don't go so far to cum), or they are too young to ejaculate yet. I doubt they are jizzing in their pants, and there's no real way to capture the cum under your clothes with it making a mess.