The subject of guppies.

BFF: So, I want guppies and I want to mate them because they have live births.

Me: What does that mean?

BFF: It means when the female guppy is pregnant, instead of laying eggs, it just shits out like 100 babies, then the male guppy eats them.

Me: Well, wouldn't you take the daddy guppy out so he doesn't eat the babies?

BFF: Nope. I believe in Darwinism.