Why Nairobi men can't resist the charm of Digo women

It is a tired story, that upcountry men end up in the clutches of hot coastal women and forget their village wives. In fact, so the joke goes, all a coastal woman, particularly of Digo extraction, needs to do is 'cook for and serve' the man she is interested in, and the otherwise responsible man and a husband would soon pack a few clothes in a plastic bag and walk into her house, for good.