Covers mostly all general sexual acts besides anal or vaginal penetration. Meant to be general and less specific. Also referred to as foreplay, but in this situation there is no "fore" about it. It's usually the first and final sexual act, but when used in plural is meant to address multiple sexual acts in one go.
Dude 1: "Yo did you get it in last night?"
Dude 2: "We didn't go all the way, but we certainly did sex things!"