It's about the bike, K1100RS   

As can be deduced by the year model of the bike, this clip was filmed in 1993.

The girl is a seventeen year old Alicia Silverstone.

She featured in the film clips of three Aerosmith songs prior to making her movie debut.

I wonder what she's doing now?

The poor lad tries in vain to clear up the keyboard, but it's too late, "there's no use crying over spilt...." The lass will now have to pee on a stick and hope it doesn't change colour.

Aerosmith's tongue-in-cheek, heavy petting metaphor's over the top.

3 years ago she still party with the Beasty Boys and many other things