Dads can get away with a lot of wacky stuff basically because they're dads, even if it's at your expense. Imagine your dad handing you a card for your birthday... and it has a few alterations.

If you're reading this, chances are it's time to wish your dad a happy birthday. It probably also means you're struggling to find the perfect words to say to a very special guy. No pressure, right?!

Comedian Katherine Ryan is an incredibly funny woman. It turns out her dad's got a good sense of humour, too. Katherine shared on Twitter some of the amusing birthday cards she's received from her dad ...