So the only flying instructors in the HP wiki are women. Madam Hooch was called Madam and not Professor Hooch so I think Ben's title is not Professor but I'm struggling to think what it would be? Is it just Mister?

Google searches for male versions of Madam are unhelpful - Sir, Lord, Your Worship... lol.

I used this as a character thing in his latest thread where Ben also doesn't know but eventually he will have to figure it out xD