sweetheart seat 

An endearing term for the middle seat in a pickup/car. Usually the front seat, where the man has the ability to drive with his arm around his sweetheart. NOT a deragatory term, but usually said with affection. Mostly used by older people, who aren't completely consumed with sexual thoughts.

(As climbing into a pickup)
David: Did you remember to grab the directions?
Susan: I did. We start out by driving 2 hours South on I-5.
(They begin buckling their seatbelts, but David smiles and their eyes lock)
David: Care to sit in the sweetheart seat?
(Susan smiles and slides on over. He puts his arm around her shoulders and they set off.)

sweetheart seat by sillylittlethings March 26, 2008