The -er suffix

Transcript:

What the heck is with the "-er" suffix?

"I'm a witcher."

"What does a witcher do?"

"I create watch catch breed f*** hunt witches."

"I'm a birder."

"What does a birder do?"

"I create catch hunt breed f*** watch birds."

"Actually I think several of those could apply..."

I think the confusing-ass formula is this:

A [word1]er is a [word2]er of [word1]s.