I might be mistaken on this, but medical syringes are needles. The only difference is how the ink/dye is injected. You would still see a needle coming right for your eye. I seem to remember reading something about this quite a while ago. If I...

Hilarious. Adams was confronted about the solution to 6*9 being 42 in base 13 and he said he might be sad, but he isn’t clever enough to write jokes in base 13. Pretty simple tattoo though.

This is a strangely green tattoo of General Grievous from Star Wars. As for a reason behind it, it’s probably just to show this dude’s love for Star Wars. No other reasons necessary.

Tattoos can be personal; who needs to explain why they have, for example, the names of their two dead sons tattooed on their leg? Who cares who Mick and Nick are?

This might help: http://en.wikipedia.org/wiki/Domain_(mathematics)#Domain_of_a_function It might make your brain twist, but read the whole section. It helps to explain why the guy with this tattoo gave this story: ”I got the tattoo because I...