omg...... my brother and me did that before, well something similar....
We were at wallmart and I needed spray paint, duck tape, distilled water, and I was craving some skittles, and my brother wanted Condoms and something for his car.
End result was some very weird looks from the chick ringing up our stuff, (who also happened to be on my bus in 6th grade and reported my to the bus driver for winking at her and I had to sit in the front for 2 days... (wtf? I was just ****ing around....)).
I don't go to wallmart alot anymore...
Moral of the story? Make your mom or girl friend buy condoms.