Momma Don't Allow

Busy, busy, busy here at TWDQ HQ but we've been saving up some ideas, so we'll see if we can make it up to you with a barrage of entries.

So we're out and about last weekend and spot the following decal in the back window of a vehicle: "IF MOMA AIN'T HAPPY NOBODIES HAPPY!" In its honor, here's This Week's Discussion Question:

Why wouldn't the Museum of Modern Art be happy?

Please keep the discussion civil and do not wander off into "How do you tell if nobodies are happy?" or "Doesn't anyone proof-read anymore?"

Discuss.