Okay! I remembered a trick I played when I was younger.
We were 16-17, hanging out with some 15-16 year old chicks that were known around town for their sluttiness. We wanted to test out this hypothesis, so we had a party. The girls game. We went out and bought O'Douls non-alcoholic beer, and put it in milk jugs. We came back to the house with jugs full of "beer". So these girls start drinking all the NA-beer, acting all drunk and shit, blowing guys at the party with ice-cubes in their mouth and shit. One girl is jacking my boy off with hand lotion saying "i'm so fucking drunk right now or I wouldn't be doing this". All in all, when the girls woke up "hungover" the next day, we told them that the beer didn't have alcohol in it and they were all fucking sluts.