Okay. So you give advice against the rules of biology. ;)

I get it you mean it's the matter between the two. We can't decide. 

But my question is general and specific to age. What's the best age ideally considering all aspects?

If they're following my advice, then what's ideal there is that they want to stay together indefinitely.

It's your life. Spend it with the people you want to spend it with.

Undisciplined

This is as if getting married is just a personal choice, you won't consider any other aspect.

Do you think it's ideal when a 60-70 year old marry to a 30-40 year old? What's ideal there?

AskSN

What's the ideal age to get married?

Coinsreporter

This is as if getting married is just a personal choice, you won't consider any other aspect. 
Do you think it's ideal when a 60-70 year old marry to a 30-40 year old? What's ideal there?