To look at someone in a vulger & sexual way.
-Guys who use girls for sex (or girls for guys) have
69 eyes.
Taken from the term "69"ing. Rather than just sex (which could involve love in some cases) The 69, being
raunch & lustful is made to the term "69 eyes" because people 'look' at someone with the lustful desire with
no attachments.
"
Don't go out with
Jim, he's got 69 EYES ! You'll be
heartbroken"