Just remember the 4 F's kids:
1st Base : French (Making out)
2nd Base : Feel (The boobies)
3rd Base : Finger (Masturbating the other Guy/Girl)
4th Base : Fuck (To get laid!)
Guy 1: So what did you do with Jane last night?
Guy 2: I Got to 2nd base with her.
Guy 1: Good job. Gotta love those boobies.
Guy 2: Boobies? I just kissed her.
Guy 1: Wow........ Do you even know what the bases are?
Moral of the Story:
Do Not Be Like Guy 1.