must-fap-to

Something so sexually arousing that not masturbating to it would be a sin.

Baby, you are not just fappable, you are a must-fap-to.

Dude, you should check out this Pirates movie, a true must-fap-to!

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Must Fap March

The month after No-Fap February where you can fap for ever... or at least until ass-lick april

I will participate in Must Fap March

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must not fap

promise to oneself saying: "I shall not masturbate"

Someone sends you a picture of a hot chick and you reply back: "must not fap". Simple :)

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