1. When you run out of shampoo before your conditioner (or vice versa) you can use the other as shave lotion
2. When somebody gives you hand or foot lotion, there is nothing stopping you from using that on other parts of your body.
3. Cutting your nails with a clipper is faster than filing them.
4. If you do a shoddy job washing off your makeup at night you wake up with a perfect smoky eye.
5. You can shower faster if you skip washing your hair. Or shaving your legs. Or putting on body lotion. Or just not showering.