gan cai lie huo ish got sexual connotation
when very dry wood meets fire, it will burn furiously
can understand? 
chuang tou and chuang wei means very fast
they (husband and wife) quarrel at the chuang tou, when they go to
chuang wei, they oredi made up....
means the quarrel is not a big quarrel just a squabble, and it is
something very common between husband and wife, and it gets
resolved very fast......
