When you feel horny, do not masterbate.
If you're married have sex with your spouse.
If you're not married, divert your attention elsewhere.
Play soccer, take a shower, go out for a teh tarik etc
Do not touch your cock, or even squeeze it.
Sex is a powerful emotion.
Don't play with it.
Once started, it may be difficult to stop.
If you did masterbate once its alright.
Don't feel bad about.
But if you want to do it again, think.
You are actually throwing away your genes, DNA, progeny etc.
Have proper sex with your spouse, that's the way to go.
Do not masterbate.
Excessive masterbation will damage your self-esteem.