Been doing a few of these since my mid teens (i'm an extreme creature of the night/habit btw):
Mixing different crispy snacks in a tub/zip lock bag - that thug trail mix
Eat cereal with ice to keep the milk cold
Bustin a nut in a t-shirt or boxers and then putting it back under my pillow until laundry day comes up.
Pee in a wide-mouth bottle (like a gatorade or powerade) in the middle of the night so i don't have to go to the bathroom. I actually started that around 20... but it's been 16 years that that nightly tradition has lived with me (quickly hide that bottle when i have women over or temporarily halted the operation when I had gf's... but once i'm single again... the bottle returns with a vengeance ---- now that i'm dolo, best believe after shooting hoops in the weekend, that Fierce Grape 32 ouncer ain't hitting the recycle bin... shiits going straight into my backpack and into my room like Brandy).
Microwave my eggs and scramble it like that.
Oh, and i also reuse q-tips as well. Maybe get three/four good squiggles in the drum canal (might be a few days) before i toss it and leave it... then i pull it out the dispenser so garbage can retrieve it.
Now cosmo says i'm fat... now who ain't down with that?
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