Of course, there's always the so called psychological effects of
NS....
I've friends who formerly were very lively, talkative, and overall
pretty fun to be with, but after they went into NS..... Well,
they're more or less just stare, idle, dun talk, stone, or plain
don't wanna go out.
I mean, from a girl's point of view, the guy isn't the same guy
that she was in love with anymore.
Of course, there's a lot of other factors involved, but this is one
of them.