When this choppers rockin' don't comma knockin'....

[birrddog]

Don't have sex on a chopper....

YouTube - Don't Have Sex On A Chopper (http://www.youtube.com/watch?v=YJjFlpQPVHU)

[Whirlygig]

And if you do, make sure your head and undercarriage are in sync! (http://uk.youtube.com/watch?v=-LFLV47VAbI)

Cheers

Whirls