No
Sexual urges and lust. And the noun is masturbation.it is the cause of desire, that in time u don't find a partner that's why u undergo to masturbation
yes..i m sure masturbation makes ur hands n feet sweat a lot..if i quit masturbation in 4 weeks my hands n feet dont sweat excessively.
an erection
Just as anything else: yes, if done improperly.