Don't light your cigarette with a candle
It may seem like an easy solution. You want to light your cigarette, you don't have a lighter, but there's a candle on the table. However, this reckless move will anger any German in the room and possibly endanger a sailor! Why? It's believed that in the olden days, sailors sold matches during the winter to earn a living. So by not using a match, you'll ruin them - or worse.