I think many Seniors when entering into a new relationship later in life, experiencing love and happiness perhaps again, or after the loss of a partner might have any number of factors to consider if they decide to live together. I've always felt to each their own, no right or wrong, what suits one, might not suit another, and I firmly believe this. Otherwise, I think co-habitation and within the possible goals of the couple's interest, can be a good thing, a happy thing, and as 'also' can marriage, and or staying single. No need to meet anyone else's expectations or beliefs, just be yourself and trust your own choices as best you can.