This definitely happens here. Husband says: Why do you need more chickens? You don't even like eggs that much (except in quiches and the like).
Me: yeah, but I have a lady who buys 3+ dozen eggs from me on the regular, and I'm sure I could sell even more. Plus we can feed up the cockerels and eat them. And you won't let me collect horses.
Husband:

We're gonna need to make the coop bigger.
I shan't be telling him I was researching guineas (and other non-chicken birds) yesterday! Or that I already have two local sources of hatching eggs bookmarked.