Oh that's interesting.
Because I think that women quite often end up with more on their plate when they don't live alone, because of the expectations put on them by others. Usually men. They can end up taking on, for example, care of parents in law or step children, shopping, laundry, cooking, cleaning more than a 50% share.
So for me, just being responsible for myself, is great. And it actually enables me to be less selfish as I have time to devote on other things.
Am I wierd? Maybe. But no more so than anyone else.