Men who date younger women are constantly ridiculed. Leonardo Di Caprio?

The fact is that as soon as a human being goes through puberty, many people will find them attractive (only pedophiles like the pre-pubescent).

The only issue is consent, which most societies have decided is around 18.

If a 60 year old wants to date an 18 year old, that's fine. No matter the genders. If everyone consents, there's no problem.