Why?
I was watching this video where people have permanent hiccups, will post it soon
Re: Hiccups
If I can be bothered to find it 
Re: Hiccups
Permanent or you meant to say 'lingering'/'constant'.?
Hiccups have many many reasons.
No real/direct benefit known but it gives a clue to other problems like fever.
Hitch!
I think someone is thinking of me. :D