I watch a lot of HGTV and there is one think I absolutely do not understand: why are people so obsessed with having his and her sinks. So many people say that it is a "deal breaker" if the master bathroom only has one sink. Why? When my SO and I are getting ready there has never been a time when I wished we had another sink. We can share just fine. I have wished we had a longer counter, so putting another sink on a nice long counter seems like such a waste. Can someone explain this to me?

CLARIFICATION: I get that it might be nice to have, but people seriously throw conniption fits over them. I don't get that level of dedication to one extra sink.