A bicycle is ready to go anytime, anywhere.
Bicycles know when to keep quiet.
You don't have to spend the night with a bicycle after you've ridden it. It's OK to pay for bicycles, you don't have to hang around trying to persuade a free one to let you ride it. You don't have to stay up till 2am discussing your relationship with your bicycle. Bicycles don't get pregnant. You can ride your Bicycle any time of the month.