dick highway

The lack of facial hair from the bottom of one’s chin to his mouth caused by friction due to prolonged ingestion of cock over a long period of time.

you either really her turn on or the sex was really good and she wants to do you over and over again and for a LONG time,

It comes from the song life is a highway,
"life is a highway, i wanna ride it all night long"

now replace life with dick...