Prudence resides on Slate.
Letter 1 is from a woman whose fiancé only eats kiddy food. She gives lots of reasons why this bothers her. He says it's a "problem" but refuses to do anything to change. Prudie says lots of stuff. I agree with this bit: is this a deal breaker? Yes or no.
BTW: "my husband is a picky eater" yields over 400,000 Google hits.
I say we lack enough background, but yeah, what she said.