Humidity, heavy rain, rapids, crocodiles, leeches, steam ... these are some random keywords that might tell you which movie today's quote is from.
I always liked Katherine Hepburn and even if I am not that big a Humphrey Bogart fan, I can't tell you how often I have seen this movie with Hepburn as the well-educated and well-behaved spinster sister of a missionary and Bogart as the gin-swilling, ill-bred steam boat captain, trying to escape the Germans (the movie is set in 1914).
What an odd couple it is maybe is best shown by this quote.
Captain Allnut says with a smile:
You carry on more over a cup of tea than I do over a glass of gin.
If you haven't seen this movie yet, do it. You know what? I think I'll watch it now myself.