We do not create constituent records for both persons of a married couple. But we do send birthday cards to both. However, in NXT there doesn't appear to be fields for birthdate (or deceased date) of these spouses. Both datapoints are critical for relationship building and should be available in NXT.
I thought this idea did not exist because I couldn't find it until starting a new idea. I can't believe this hasn't been added to NXT yet! I just went to merge a deceased spouse record into the living spouse's record so that all data could be in one place. I was able to successfully merge this fully in NXT except for: documents attached in Database view (ugh) and the deceased and birth date for the now non-constituent deceased spouse. This is super relevant information and should live in the overview tab and/or biographical. There is no reason to keep a now deceased record separate from the spouse, so why are we forced to in NXT if we want to record key information like this? The deceased date added in DB view shows in NXT (after adding in DB view), but there is no way to get to it again, nor does his birthdate entered from DB view show. It also doesn't appear we can add birth date or deceased date for a non-constituent living spouse.
This is the ONLY reason our MGOs are still having to go back into database view. Please please please add this feature. :)