The offender must blow into the device every time the car is started. If there is any alcohol in the offender's blood stream, the car will not start.
Then he takes off his pants and lays back on the bed with his feet dangling over the side. The girl then gets on her knees and uses her oral skills until the man has a orgasm! It is always covered and the girl always clean the man up including the little drops... Ex: The man comes to the sex master to get a Blow'N'Go!
If the services are rendered on site or behind the building, it may more technically be referred to as a Stop-'n'-Blow rather than a Blow-'n'-Go.