Fuck this shit.

Bowties are starting to become trendy in here, I see a lot of teenagers, teen actors, and fashionable people using bowties, and it's not like they're using it along with a busboy's uniform or a tuxedo, they use it with a goofy coat like Smith. You can easily tell it's cool now because of Smith (or maybe someone who watches Smith thought it was cool, and then it snowballed from there and now people who aren't even familiar with the show think bowties are cool.)

Also, wasn't the whole point of "bowties are cool" is the fact that it's not, and the doctor only makes it cool because he's the doctor (or it's cool because he's totally unaware that it isn't). When other people ape it it's just goofy.