Green’s Dictionary of Slang

feelies n.

[feel n.]

sexual petting (and intercourse), esp. in a dark cinema.

1984
198419851986198719881989199019911992
1993
[UK]Partridge DSUE (8th edn) 384/2: since 1945.
[UK]T. Blacker Fixx 180: Down boy [...] Feelies are for upstairs.
[US]R. Shell Iced 45: To hang out and sneak feelies and kisses with the girlies.