Double Entendres

I get the feeling like the presence of double entendres in I Love Lucy is overpowering!
For instance, in Lucy's Schedule from season 1...

What does "that" mean, and why would Lucy need more than 15 minutes for "that"? Hmmm... Sexual innuendos, ain't they?

I wonder how they got past the censorship board review. I'm glad they did, because they're sure funny and entertaining!