I was on the deck when a woman came up to me and asked....
"How long is it?"
I replied " Isn't that a rather personal question?"
She blushed and said " No, I mean how long does it take?"
I said " Well now, that all depends"
She went even redder and said "No,No, How long until we get to the next stop?"
I told her and she took off with a blazing red face.