Quote from Barney in Hooked
Ted: What? It's just a job.
Barney: Just a... Just a... Ah! Ted, throughout time, there has always been one cutting-edge profession to which hot girls, like Tiffany, have flocked. Shall I walk you through the history?
Ted: I'm gonna explicitly say no.
Barney: It all started 2.5 million years ago.
[flashback to a cave-man Barney hitting rocks:]
Barney: [v.o.] Man was a hunter. So the hottest profession of the day? Gatherer.
Barney: Homo erectus, indeed. [winks to camera]
[flashback to an injured Barney in a field hospital:]
Barney: [v.o.] As man mastered technology, the hottest profession of the day evolved.
Barney: I'm pretty sure it's a hernia. Can you check again? [winks to camera]
[flashback to Barney seated in first class on an airplane:]
Barney: [v.o.] And then man took to the skies. And so hot women put on high heels and became stewardesses.
Barney: I am in the upright and locked position. [winks to camera]
Barney: And then man said, "Life is hard. I should start taking lots of prescription drugs." And so, hot girls rolled into doctors' offices, looking sexy enough to render the very erection pills they peddled ironically redundant. So, now, pharma girls are today's hottest profession.