Whats a good cardio machine?

[Lone Trooper]

Man, I would have to have sex like 50 times to burn 500 cals... :frlol:

Go minute man.

 

[Cynical Simian]

 

[Guinness5.0]

Go minute man.

By the time I get to 20 or 30 times it's more like a minute and a half.