"If more people focus on what makes them happy, it leaves more room for the rest of us who want to monetize everything."

Is that a joke? ...maybe. Mettaton himself isn't quite sure. Though he is pleased that he got Sans to laugh at his, quite frankly, inappropriate joke. What if one of the kids had overheard? This party is supposed to be family friendly. You're slipping, Mettaton.

"No point in having shame when you know you're wanted. It's giving the people exactly what they asked for."

And they asked for a sexy rectangle. Though now he's a more elongated sexy rectangle.