"It's hard to explain this one and I can't google it to find pictures. Everyone has bought a tube of "cream" at some point (antiseptic / steroid / eczema) for example. On some of these "creams", have you noticed that the lid is circular but in the centre of the lid it has a sharp pointy end? Typically, these tubes of "cream" have a seal and I used to remove the lid and break the seal by finding anything sharp and pointy nearby (pen maybe). It took my 23 years to realise that the pointy end in the centre of the lid has a purpose..."

"Thought an orgasm and an organism were the same thing.Gave an entire speech to my class at 13 years old, first month at a new school, about how I wanted to be a marine biologist and work with marine orgasms. Everyone was laughing and I didn't know why. The teacher didn't say anything just laughed along as well. A girl I'd just made friends with had to fill me in after class.Turns out, they are definitely not the same thing."