As always, Barney has an interesting theory about the sexiest occupation nowadays and if you're thinking about models, strippers and exotic dancers, think again. You'll learn more about Barney's theories in the 16th episode of How I Met Your Mother's fifth season entitled "Hooked," which airs on Monday, March 1. But if you can't wait that long, you can find the answer after the jump.

Warning: Spoilers ahead!

In the video clip below, Barney (Neil Patrick Harris) finds out from Ted (Josh Radnor) that Tiffany, Ted's latest girlfriend played by Carrie Underwood, is a pharmaceutical sales rep which would explain why all her co-worker girl friends are also hot. Apparently, a pharmaceutical sales rep is considered a cutting edge profession and Barney explains this through a story that started about 2.5 million years ago.



Do you agree with Barney? What do you think of his theory? To find out more about next week's How I Met Your Mother episode, check back for our full preview of "Hooked."

(Image courtesy of CBS)