i think masturbation is not a sin, overdoing it to the extent that you start to yearn to touch yourself unnecessarily or begin to mentally 'rape" every girl that walks past you is definitely a sin.

i remembered reading somewhere before that if you look at a pretty girl as she sashays past you, that's human nature. but if you deliberately do a u-turn and go one big round in another attempt to see her again, that's cavorting. and once you begin to cavort, you lust, and if you're weak-willed, you may commit petty crimes like touching them lah, take mobile phone pictures without their knowledge lah...

too much of anything is bad ultimately...

i guess my question would be - is having an urge a sin?