I wank because I don't have anyone to have sex with and I don't like waking up in a sticky bed.
I don't do it too much as that's rather perverted and wrong and it makes you have nasty veins. And it makes me feel guilty afterwards.
I don't care if other people wank or not or wether they lie about it. My best friend told me he wanks as he said he woke up after having a wet dream. Not nice.