This strip seems to be doing long running story arcs these days and often one strip alone makes no sense unless you’ve read the previous three or four. I’ve stopped following it for that reason. It’s irritating.
As for the strips above, my wife and I go out to dinner on our anniversary and do exactly this (minus the getting naked part); work out our budget for the year with a book, pencils and a calculator. Call us hopeless romantics if you must, but what they’re doing didn’t seem that unreasonable to me either.