Learned a LOT about snails today.

Fact #1: snails can't absorb color pigments. If they eat colored paper their feces would also be similarly colored.

Fact #2: some snails have something called a 'love dart', a thing they store in their bodies (in what is referred to as their 'dart sac') that prior to mating they try and shoot into other snails. The other snail doesn't have a thing to receive this dart(it's analogous to being shot by an arrow), nor is it an organ for sperm transfer. Nuts.