Well, huh. Leave it to PostSecret to turn a Hallmark holiday into a tear-inducing glimpse into different types of fatherhood.

If you've got a minute or two and are looking for inspiration to call up your pop and wish him a happy dad's day, go look at this batch of secrets. Of course, they might just as easily give you a reason to never speak to your father again...

And on that note, even though he hates it: Happy Father's Day Dad!

Four from the PostSecret mailbag.