@marktearle asked people on twitter to state why they ride a bike by using the hashtag #irideabikebecause. 

My take: #irideabikebecause it's wonderful. rain or shine, slow or fast, short or long: wonderful. Quite a contrast to #idriveacarbecause I have to.

Go on... why do you ride a bike? 

http://twitter.com/#!/search?q=%23irideabikebecause