Making a lot of money doesn't make a grown man writing a song about wrinkly wieners (the validity of this statement is questionable) or teen pop stars feeling isolated in Hollywood any less weird.
Let me say most importantly that if you look at his writing credits you'll see he didn't pen that one.
Second to that - go look up the lyrics. It's about old guys hitting on young girls. It says nothing about "wrinkly weiners" at all. To say that's what the song is about is straight up ridiculous.