Zac Efron & Adam Devine Teach Us How Brothers Are Made In Raunchy Bedtime Story

In an effort to promote their new movie Mike and Dave Need Wedding Dates in which the actors play brothers, Zac Efron and Adam Devine are telling us EXACTLY where brothers come from (in case you weren't away!)

The two actors take turns reading hilarious lines from their storybook and it's definitely worth listening to!

Just make sure you've got your headphones plugged in if you're at work (and don't read this to the kids!)