Also, nice job changing the subject. My niece is fourteen years old and I don't want any MEN following her into the ladies room, no matter WHAT they CLAIM to be.
A chair is "a" device designed for comfortable sitting. I didn't say it was "the" device.
You wanna draw distinctions between dune buggies and motorcycles and claim one's not a vehicle? A motorcycle is "a" device for transportation.
Anybody over the age of eighteen, who can legally sign contracts can get any modifications they want. Tattoos, devil horns, Vulcan ears or even have parts sawed off. It won't make a devil or a Vulcan, though. It's all make pretend.