what he probably means is that if you analyze it a bit further, you will realise that you actually want to feel like a good person that cares for your sibling and so you buy them an ice-cream. It reminds me of my friend that at some point she had been so devastated with herself because she didn't really care about how her father is doing in his work and so on, so she bought him a present and called him and talked with him on the phone about his problems. She then came back to me and said that she felt better about herself doing that. She forgot about him then for the rest of the month and if there was ever a hard time for her father she wouldn't call him so that she does not have any problems herself....(right...it's like i'm telling you a tale from the bible now...) Anyways, what i want to say actually is that most people think that they care about everybody, though they actually care about themselves by doing favours and stuff to "satisfy" others, only to serve the feelings they have towards themselves. Phew..i said it. I hope you got the point cause everybody knows that i suck in english.