It's a simple fact, that's what makes it non-lololol. There are no non-selfish acts because of human nature alone, BUT i'm open to hearing any example where that doesn't ring true.
Meh. I do those things a lot (and I guess so do other people). Keeping a door open for a stranger, helping my mom with the dishes/groceries, helping someone with a pram up a flight of stairs, giving money to charity etc. None of these are done so I would feel good about myself, but simply because they ask me, need help or it's the right thing to do.