What would we do without research?
I'm convinced that for some people (well, many) talking about themselves provides a narcotic effect.
Some people are only interested in themselves.
Anyway, my advice to men would be to completely blow off the women who need this drug fix of ME ME ME ME ME. It's a bad sign.
AND, while you're at it-check out Rosen's Rule of Selfies:
There is a direct correlation between the number of selfies that a woman has on social media to how crazy and selfish she is.