I can give you a grown up answer for that. Speaking of intimacy, a woman is capable for longer time than man, so from that perspective, older woman is better than man
If you are saying older woman is better for man then why men are attracted to younger girls. And why girls get mature before men because if some old man marry her she should understand everything.
If you wanna take religious example the most common one is Hazrat Ayeshaa (R.A.) if ALLAH SWT has defined age doesn't matter then why people make fun of other couples.