Sex is part of marriage but there is a lot to it,you might need children ,to take good care of you when you are ageing ,your wife or kids to inherit your properties when you are no more and some other vital issues
Most people think that a good retirement income will do this. But they are wrong. For example, hospice costs these days are like $5,000 a month, basic. This drains the retirement income right out of average Americans. Government takes over, but it is draining the resources of government, as well. It's going to collapse the whole money system if it continues going on like this.
So, you are right. People will need family to support them in old age. But many (most?) people don't have it set up this way. Not in the USA, that is.
