Personally, I’m only worried about it when the woman (or man I suppose) is still in their 20s. By the time adults reach the age of 30-35 years old they have had enough life experience, and hopefully know themselves well enough to understand what they are looking for in a mate. But, the only people I would presume to tell how I feel would be my own daughters. As for others, if they love each other and are happy, then I would support them.
I have to fire up the grill, this steak is out of date.