Butterflies are beautiful and are the favorite insect for most folks (I like honeybees best myself). But they aren't here to please us, as Hank Green makes clear. He also mentions at the beginning that butterflies don't have weird, creepy tentacles, which turns out to be untrue. Have you ever heard of a "wafting organ"? That's the thoroughly unscientific name for coremata, which are stinky butt tentacles you never expect to see on a butterfly. Female butterflies like them, and that's what matters to a male butterfly. Or moth, which is the go-to example here for some reason. I'm sure Minnesotastan knows more about this; he's the only butterfly expert I know.
BTW - this is a better link: https://tywkiwdbi.blogspot.com/search/label/butterflies