If there is no money involved (one party is not significantly more wealthy than the other) I see nothing wrong with it. I WOULD recommend and iron clad pre-nuptual agreement. If this is one person's way out of a bad situation, be very careful.
If the parents have given the female permission.
yes but the underage female/male has to have a parents consent
If you are a 32 year old male, you can marry a 35 year old female.
yes
He can.
Yes.
Yes.
Yes if he has parental consent.
Yes.
no
Yes, with parental consent.
people will not think so.