Faux Real: when my sister went off to college I gave her two boxes of condoms. One was an open 12 pack of magnums with 7 condoms left in it. the other was an unopened package of normal sized condoms. I told her to put the magnums in the front of her bedside drawer, and the regular one farther back. when she had a dude in her bed, she would absentmindedly reach for the box of magnums, pause, look at the guy, and reach back and open the fresh box of normal sized ones.