Wow, why so aggressive?
I think the point is not "why would anyone ever ask those questions" but rather "why are those questions asked SO FREQUENTLY as to be the most likely phrases to follow the word 'why'?"
Jesus you sound like someone found your google history of "why does my penis look like a vagina".
Saliva causes cancer, but only if swallowed in small amounts over a long period of time. -- George Carlin