Such as, for example, the correct rhythm to use when giving out a phone number.
I asked a friend for his mobile number the other day and he said:
'XXXX XXXX XXX'
Which sounds like this: dum, diddy dum dum. Dum, diddy dum. Dum, dum, dum.
Which is just plain wrong.
It should, of course, be:
Dum, diddy, dum dum dum. Dum, dum, dum. Dum, dum, dum.
Or: XXXXX XXX XXX.
I am however torn on the correct rhythm for giving out fixed line numbers in London. The first 7 or 8 is technically not part of the area code any more, which is 020. But two consecutive bursts of four digits sounds much worse than a cluster of three, followed by the last four.
So my head says: 020 XXXX XXXX
But my hear says: 0207 dum, dum, dum. Dum, diddy, dum dum.