I'm (re-) reading Inside Out at the moment and it states that David studied modern languages at Cambridge Tech. This possibly explains his uncanny ability to speak to the crowd in their homeland's tongue throughout the 87-94 tours. But perhaps the "science" gene skipped a generation.

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what do you teach your children about me?
what do you teach your little children about me?
pimp, thug, bling drug lord of the undergrounded kings
how can you be so sure i won't call down the rain?
what do you teach your little children about me?
you point your gun, wait, hide and run. i see it plain