Rarity: Hnnnngg.... Spiiiiiike my perfect figure is gone and I simply can't stop eating! It's absolutely awful!
Spike: Ehehe, it's alright you still look amazing to me.
Rarity: Oh please don't even go there. I know you're just saying that.
Spike: N-no I'm not!
Rarity: Yes you are!
Spike: Fine, so what do you want me to say? Gee Rarity you sure have been looking pretty pudgy lately
Rarity: How could you say that Spike D:
Spike: I just can't win can I?
As a two-time father, I can say that variations of that complement worked both times. At the very least they lifted her mood, because she tended to get depressed when she had cravings. I understand it's different for every woman.
* If you subscribe to the idea that Ki-rin (equine-dragon hybrids) come from an egg, Rarity is in that case incubating their baby's egg. Either way, the complement still holds.
Today I learned that pregnant women get constant moodswings. Rarity is having constant bouts of freaking out and sharp tongued moments. The test of a father is to care for the mother-to-be, keeping her happy and comfortable. This is going to be a long nine months or so. Aren't you glad I was adopted?
Your son Spike
Spike: Then we just have to push you back in the water.
Spike slept outside that night.
Anyways, it's a cute pic you made.
"A whale? You mean those aquatic mammals that effortlessly move with grace and style in spite of their size? They even sing nice, if you know the language."
Great, now I can't even stay mad at him.