Call me a cynic or call me politically incorrect for bringing up the age difference. But it exists. Anyone who has a relative or friend in their eighties would be suspicious if their friend or relative announced that they were going to marry someone 25 years younger. Most people aren't interested in marrying someone old enough to be their parent.
While having a grandchild makes a grandparent, it doesn't make us all alike. Yet, most often when we are portrayed by the media or advertisers, we have silver hair, wear glasses and are pleasantly plump or if you are man, you are usually pictured as bald... We don't all sit on the front porch in rocking chairs knitting booties or crocheting sweaters.