Whenever we order a meal, I'm reminded that I am often more selfish than Mrs. Bee. I'll order what I want, whereas she will always order food that she thinks the kids will eat. That rarely occurs to me! That said, I've gotten a lot better at adjusting my order based on Mrs. Bee's positive example.
I have areas where I'm not selfish though, like if I'm up early then I'll sometimes watch both kids - or if it's cold out, I'll give her my jacket. Overall though, I think that I'm probably more selfish in ways. Or you could just say that I am good at "on my own oxygen mask first before assisting the person next to me."
Who is more selfish: you or your SO?