Semprini, according to
Graham Chapman was used as a bit of a
non sequitur by the
Python team and a bit of an
in joke.
Semprini was apparently an
Italian opera singer of no particular significance.
It's also an aftershave used by Mr Gumby in the same episode of Monty Python's Flying Circus. Eric Idle of course, prefers the aftershave called rancid polecat.