Re: How I Met Your Mother: Barney and... (Spoilers ahead...)
Shouldn't the mother sit in his lectures?
No.. the one time that happened Ted picked the wrong class (it was his first time as professor). It was just a tease within the show and i'm pretty sure that really obsessed fans started to analyze the pictures and look for the mother
"Zhu Li Moon.. will you do the thing for the rest of our lives?" Varrick