Yes, in exactly the same way that if you never own a car, you will never leave your house. Stunning logic there.
Might wanna switch to decaf.
I just noticed that I often open a newspaper in the morning and read about what Mitt Romney has said and then promptly poop.
Yes, but not only nicotine. They are made to respond to acetylcholine, a common neurotransmitter, and are found in many places in the body. It was discovered that they respond strongly to nicotine, while another type of receptor doesn’t respond well but does to muscarine - the muscarinic receptor (yep, mushroom juice). Other drugs can affect it as well, like Varenicline (Chantix), and Epibatidine from the secretions of poison dart frogs.
Caffeine also affects acetylcholine, among other things. I don’t know which receptor prefers it, though.
This one’s my favorite, altho the typo with “dowel” was fun too.