Eat-no
Drink-no
Read-no
I have an uncle who will take his coffee into the bathroom and often will leave his mug in there. The thought of just that makes me cringe. I do not do any more in there than what needs to be done.
I eat in the tub - nothing like a relaxing bath at the end of the day, with a fresh piece of fruit (a peach last night).
Never, ever on the toilet.
Susan
FairyChatMom certainly has a way with words, doesn’t she? 
Shoot, my old college roommate used to eat sandwiches while taking a dump. I can’t imagine doing it myself, but he did…
hrh
Sometimes I pee while I’m brushing my teeth.
My GF finds it funny and gross.
One of the fundamental tenets of successful civilization-building: Don’t shit where you eat, and vice-versa.
I do my best thinking on the can… But I never eat there. I love to read on the can… something about being in a small inclosed space that makes me concentrate a little bit harder.
As far as eating goes… I eat at me computer, my den, my dinning room, and my car, but never on the can.
Sometimes I might bring a beer along with me, but never drink and bm at the same time, friends won’t let me…
I have a friend who won’t even go into the bathroom if she has gum, a mouthful of food, or drink in her mouth. I think that’s just her being overly paranoid or something, because her house is the cleanest place ever.
As for me, I’ve brought in a glass of juice in the bathroom while I do my hair or makeup…of course I don’t make it a regular habit though. I don’t eat while on the can or anything, just cuz it seems weird. I’m not a real squeamish person but hey.