Ok, so what about in the context of parenting?
I personally feel that my children's needs should always come before my own, since they're little and didn't ask to be born! I know some MN'ers would call me a 'mummy martyr' for that - though I really don't understand that term because isn't a martyr some that's killed for religious reasons?
So it really pisses me off that my DH will often put his own needs before the childrens. Though I mentioned a specific incidence to him this evening and he had no retort and fell silent . . . so maybe it is just the unthinking thing a pp mentioned and he doesn't realise.
In which case . . . new AIBU . . . to think that stupidity is bred into all men? (lighthearted) 
However, I also know as a pp said that in a life or death situation he'd take a bullet for any one of us without giving it a second thought.
This was supposed to be more of a general post though, because in my wonderings over DH's behaviour this evening I just started thinking, actually I've never met a man who DIDN'T behave that way. Dad, brothers, friends, friends partners.
So there's really no point in LTB'ing over it because the chances of me finding one who isn't selfish is slim 