Add Yahoo as a preferred source to see more of our stories on Google. Getty Images He's the greatest guy you know, your first best friend, a lifelong role model - where would we be without dads? But ...

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.

Your father is likely one of the most dominant forces in your life. That’s why on his birthday, it's important to let him know just how much you appreciate his enduring love, support and guidance.

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