Yes, it makes you temporarily insane so you reproduce. I agree. I think marriage should be more like a business partnership. Respect, teamwork, equitable division of labour towards goals (however you want to count it). If you enjoy each other's company and have compatibility (intellectual, sexual, emotional), I see attraction as a natural extension.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh