So I'm instead going to go with the most honest (and boring) answer possible: drinking water.
Yep, I went there. I am not kidding when I say that water is my favorite beverage and that I crave it all day, every day. I pretend I'm still a camp counselor and carry one of these bad boys with me wherever I go, including to meetings at work, which I'm sure makes me seem very mature and professional:
I usually fill this up about 4 times a day, which means I drink approximately 120+ ounces of H2O per day. (To answer your question: yes, I do frequent the little girls' room as a result of this habit).
Back in my younger days, I was addicted to Coca Cola (I would have said "coke," but I didn't think that would be smart to pair with the word "addict"). For a reason I can't remember, I decided to stop drinking them in 9th grade and started replacing them with water. I never did go back to drinking soft drinks (except the occasional Sprite), so this really is about the only thing I drink. Once again, I know how riveting it is to read about my life- you're welcome.
I'm really not sure how to expound upon this topic any further... so I won't. So now you tell me: what is something you could never get tired of doing?