Lyric discussion by enjoyyourroots 

Cover art for Taste lyrics by Animal Collective

The "things" outside of him, are literally all the "things", material subject, outside of him... He's speaking of taste as style whether it be clothing, art, or anything at all. He is just tired of everyone being so judgemental. and his response is "Am I really all the things that are outside of me?"

maybe we are. but i sure hope not.