1 Star - Making out.
2 Stars - Boob touching, over or under the shirt.
3 Stars - Hand jobs, fingering, getting turkied, jerking.
4 Stars - Oral sex, carpet munching, head.
5 Stars - Vaginal or anal intercourse.
The stars make communicating how your weekend went easier amongst friends.
Dude #2 - "It was awesome bro. I had a 5-Star weekend!"
"She's such a slut. I hear she went to four stars on four different guys in one night!"
Sexually Frustrated Person - "I've only ever had one star..."
"This star system is so much less confusing than the base system. WTF does it mean when someone says short-stop anyway?"
One Star: making out
Two Stars: anything else with hands
Three Stars: hand jobs
Four Stars: oral sex
Five Stars: sex
Dude 2: I had a five star weekend, according to the star system!!
Dude 1: AWESOME.