Two Doctors

Two Indian doctors were having a discussion:
‘I tell you it is spelt W-O-O-M’.
‘NO, it’s definitely spelt W-H-O-O-M’.
An old lady passing by remarked
‘Gentlemen, I’m afraid that you’re both wrong. It’s actually spelt W-O-M-B’.
One doctor turns to the other and declares ‘I bet she’s never even SEEN a hippotamus let alone heard one fart underwater’!