Most men become familiar with the basic concept of a male orgasm at some point in their early to mid-teens. The experience is often accompanied by a hurried cleanup of underwear or, infamously, socks.

Around the same time, guys also become aware of the purpose of male orgasms in reproduction, and generally, that's where their knowledge ends, especially given the state of sex education in the United States.

It's a safe bet most men rarely stop to ask themselves deeper questions about "the moment of truth." Worse, perhaps, more people are getting their sex information from social media and, of course, porn, which can perpetuate a number of sexual myths, including penis size and how long men should last.

So it might be time for a good 'ol crash course in the "grand finale."

1. There is no average time