One thing a foreigner should learn in Russia is Russian superstitions. Important note – things that most of foreigners regard as superstitions are regarded by Russians as traditions or customs. For example, if a black cat crosses you pass it brings bad luck. Russians believe that this is a superstition although most of us would try to find another pass so as not cross the road “marked” by a black cat. Once I saw a driver who stopped his car when a black cat run across it until another car passed. You see, bad luck awaits only one person – the one who crosses the “marked” road first.
On the other hand, giving an even number of flowers to a woman is simply rude. For Russians it’s not really a superstition but a tradition (also in Romania, Slovakia, Hungary). If you give flowers to someone the number should always be odd (one, three, five, etc.). If you bring flowers to a funeral the number should always be even (two, four, six, etc.). Anyway in Moscow when a foreigner buys flowers and asks for four roses, the seller will almost always asks, “Are they for a funeral?” One of my American friends was indignant at the flower seller’s impudence – she refused to sell him a dozen roses he wanted to bring to a birthday party. She wasn’t really impudent – she saved his reputation before he made a very rude faux pas and upset the hostess.
Here’s a list of superstitions that Russians regard as traditions. If you don’t want to look rude, don’t violate them in Russia: Read more of this post