In a previous article, Sometimes I feel like a petrol pump, I wrote Two’s company, three’s a crowd, and I have had questions as to what this English saying, or idiom, means from friends in none English speaking countries.
Two’s company, three’s a crowd, can refer to when a couple will go out for a romantic meal and the woman takes her mother with her. Thus the romantic meal will be uncomfortable, in fact, unromantic.
Two’s company, three’s a crowd, can also be used when referring to too many people being present at an event when the event was designed to be for a small number of people (two), but is usually only used when referring to two people, as above.