Whether it's sex, socializing, or skydiving, marijuana's affect on performance can vary. Pot is in a drug class by itself ?ither considered a stimulant, nor a depressant, because its effects are in large part determined by the expectations of its users. If you anticipate or hope for a mellow, ride-with-the-tide, go-with-the-flow result from lighting up, that is probably what you will get. If a giggle-fest is your goal, then your tokes may well tickle your fancy. By the same token, marijuana, alcohol, and other drugs can also amplify one's pre-existing personality traits: paranoia; fearfulness; gregariousness; anxiety; aggressiveness, etc. And, these factors don't jump out the window when you jump into bed.