A very elderly and frail gentleman turned to his equally aged friend, Bob, and asked if he could remember the name of the stuff the army used to put in their cups of tea during WW I.
'You remember' he told Bob, "It was supposed to keep us soldiers from getting randy in the trenches.'
His companion remembered the ingredient but couldn't remember what it was called. He asked, however, why his friend wanted to know.
The answer was, 'Well, you know Bob, I think it's started to work.'