Why do people forget their parents when they got married?

Not all people forget, i would like to correct that if i may, but yes what happens is that their priorites change, so parents and others around them feel that they have changed. It happens with most people more so those kids who arent staying with their parents and are living elsewhere with their families. Earlier they were all the time with their parents and doing everything for them, being a part and parcel of their day to day affairs etc, but all of a sudden after marriage, a vaccum is created when the person leaves home. No one is there to take their place, they are missed, whatever help they were in the house, what and how they looked after, etc, all the things are missed and we all feel that that persons changed, as hes not seen in the picture any longer. We have to realise that that person also has a new life, and spouse to take care of now, they new to the marriage, they need time together to know each other now, as they both have to spend a lifetime each other with now. And they cannot devote the same kind of time they used to before marriage now, they cannot come to meet that often and be always around too. Yes phone calls should be made regularly though, on their part as that is a help for parents too. But i guess, parents do think that they have forgotten them. Parents need to realise this and try and remember their times too, that we all under go this phase and should be reay for it. When kids get married they have their own lives, and families to take care of, and cannot devote as much time as they used to before marriage,and we have to let them go, and wait for them to come on holidays or weekends and enjoy being with them that time, make the most of it.