I tend to roll my eyes at the "age is just a number". It's cliche and doesnt give credit to the very real issue he's going through. Their respective ages may not be a problem for them, but I guarantee the differences in where they are at in life will require some deep discussions before they can move into anything with lasting potential.
...if it's just a tryst both are after, well, by all means...enjoy the ride.
...if it's just a tryst both are after, well, by all means...enjoy the ride.