Feature Request-Multiple Name Fields

Within a customer record, I would like to have the option to input two full names. We have customers that don't share a last name. For example a husband & wife have different names, couples aren't married, same-sex couples, no gender affiliation, etc. Would also like to have a title associated with each person or the option "none". e.g. Mr., Ms., Dr., none.  I would then like to be able to reference each name to associate with their birthday. Birthday Person 1 and Birthday Person 2, so that we can track which birthday belongs with each name. Want to make sure birthday cards are addressed correctly! Also, an option in phone numbers for Person 1 & Person 2, would be extremely helpful. That way it is clear which phone number belongs to which person within the record. Possibly in a column format that shows the name of Person 1 and then their associated info. below (title, phone #, birthday) & same for Person 2. 

Thank you.