Sometimes I get the punchline
One is still in the EU.
A mosquito can fly, but a fly can't mosquito.
Ten. (Shame this one doesn't work too well for reddit - the funniest part of this joke is the third punchline enjoying people struggle to understand what the hell you're talking about.)
The HI-C! (punchline must be said in proper pirate voice) (this is what I do when bored at work not even ashamed)
A visitor.