Sex

A few things you've always wanted to know about sex: why we enjoy it, how to explain it, and, importantly, how flowers do it.

Poop, parasites, dead duck sex, eating bugs, and many more impolite -- but fascinating -- topics. These talks are for the non-squeamish.

Love: it’s what makes the world go round. And also: all you need. As well as that thing, in addition to war, in which all is fair. Here, TED Talks about this most basic of human emotions.

You probably didn't learn this in sex education...