Not wanking can give you motivation. In all, its probably better not to before a night out. Unless you have problems in bed, then I'd say you might want to for certain reasons...

only one of those events can happen Dan...

True.

I think it's gunna be christmas though cos by this stage, half of the world would have ended already due to timezone.

Or maybe they have & everyone there is dead.

Wanking is wrong wrong wrong!!! I do it away too much - I'd say its probably acceptable and probably good to do it, say, 10 times a year.