I feel it begins to strenghten with Maturity, some at 25 Yrs old and some at 50, but it is when we BOTH learn selfrespect and live it, and use it, to keep that bond togather and respect each other, So,
One must learn selfrespect, before they can Respect the the other, When they both respect each other, they both do whatever it takes to do MORE than their part, and both give Extra Special attentyion, and dont do things that are going to Damage it..... It Must be given Care, just as a plant, It starts as a seed, then it sproughts and as you give it Sun and water, give it nutrition to grow, and in time, It should produce a wonderful Relationship!!!!!!!
But It MUST BE BOTH working at it and never slack up , It Can Flourish, and Be Wonderful..... But many are selfish and take fron it instead of adding .....
Like a Bank account , If you ad and respect it ,and feed it, it will Grow, more, more
If you keep making withdrawls, it will soon be a CLOSED ACCOUNT