Why are there over 5100 questions with the word "fart"?

Because they like my user name

Simple.

They are being asked for the same reason that your question, which is one of the 5100, is being asked.

You find the word itself amusing, and have a desire to shock.

Frankly, its a bore.

two reasons why,

1.They are embarrassed that they fart. and for number two,

2.The questions have equal the billion fart jokes, the real questions is why do we have fart jokes to Begin with.

no pun intened.

because we people focus on some of the stupidest things most of teh time

thanx 4 the points

because people have too much time on their hands

they must of let bart sinpson out of his cage