Why do people want to share their life stories in a half hour?

Today I met with a sales rep for a vender who is wooing my company. I found out more about that guy in the 35 minutes I sat talking with him than I know about ANY of my co-workers (and I've been here for five months now). This is not so much a comment on the sales rep being crazy (though he was a bit), as it is a comment on my coworkers being crazy. They aren't crazy in that obvious way though, it's more like that scary way that makes you think one of them will someday blow up the building.

Anyway, the guy is from north NJ, has been in his industry all his life, lived in SJ and SF for brief periods of time while he hung around deadheads, his last Dead concert was in '79 in Berkeley at the R? He came out for the last time to get a job in Palo Alto, but decided it wasn't right and went home to NJ to marry the girl he was in love with, consciously making the decision between the deadhead lifestyle and the girl. He had four kids with her, and then got fixed, then they adopted two kids (11 and 9) from Romania, because the girl looked like his wife, and they wouldn't separate siblings. She does their finances because he always want to negotiate with the bill issuer on the amount. His wife came from a family of 8 and he came from a family of 7, he's of Irish decent, and she's of a darker complexion. When he was young, his buddies always talked about going to California when they were smoking out, and he though it was odd that they didn't think about going to NY which was just across the river. He has five cousins in San Diego but he's only met two of them, they live there because their dad was stationed there when he died in the services and they stayed there. He's worked at the compnay he represented for 18 years. and he told me to never pray about adopting a child (not that I asked) because it was useless, there is no reason to say no to tkaing someone into your home.