Us men like using shampoo. We just don't subscribe to the notion of actually buying it. The bathroom might house one bottle amidst the ordered chaos that is two-in-one shower gel/shampoo, but it won't last. If it belongs to you, hide it. Keep it safe. Make it your horcrux. Otherwise you risk your stock being depleted in record time, and not just on your friend's hairy head, either...
