Though they're pretty quirky, we think we'd actually get a lot of use out of this set of forty Volcano Cards ($52) by artist Marie Delafon. An erupting volcano could work in a lot of situations. Here's what we're planning on writing on the inside for a few occasions:
Happy birthday. We thought a lava flow would help you light all those candles.
You make me so hot.
Welcome to your new little baby. Poop will soon be shooting out of a diaper just like this.
Congratulations on losing your virginity.