The idea of infinity is already pretty trippy, but what's even crazier is that there are (M)ultiple "sizes" of infinity (e.g., countable and uncountable)
"HeadOn, apply directly to the forehead [repeat ad nauseam]." (For anyone who remembers that awful commercial, I apologize. I hope the pic makes up for it) (M)
The allele that causes people to have more than five fingers or toes per hand or foot, respectively, is dominant over the one for five, which is kind of a (M)indfuck
It's very strange that "the birds and the bees" became a euphemism for talking about sex. (M)any birds don't even have external genitalia, and I'm probably not unique in having no idea how bees fuck
Idea: a (M)agazine for bi issues called Biweekly that – because "biweekly" can mean either twice a week or once every two weeks – is intentionally published with a random schedule