A young businessman is going on a business trip to Germany.

It is his first
time abroad and he is not overly worldly.

He enters a bar and is soon being chatted up by a girl he does not realize
is a prostitute.

Naturally enough they end up back in his hotel room.

When she is ready to leave, the man is showing no signs of paying.

Indignantly she asks, "What about the marks?"

The man ponders this for a moment, and replies "On a scale of one to ten, an
eight I should think".