I need to ask u a question?

What does it mean to Jak off
does it make ur thing stronger
Answer: No it make you pretty weak after, but who cares.
Will a UK PS3 play American PS3..
It means to use your hand to pleasure yourself sexually.

No, it doesn't make your thing stronger. It's not a muscle, so it can't gain strength. Sexual stimulation should give you all the firmness you need...if you're having trouble with that, I recommend asking a doctor about it.
Where could I buy a nintendo Wii?
listen dude. it means to masturbate ok? do you know what masturbation is? bet you do.