Hopefully he knows how to use soap, water and deodorant.

I don't think many of us actually use the little circle motion...and I am assuming he wasn't

He must be fun to kiss.

Maybe your just really picky, let's be honest here.

What is the correct way?

seems like no matter how you brush your teeth, you're doing it wrong anyway

Wow that's.. Just what? 23 and he can't.. Correctly brush.. My condolences to you OP.

How did he brush his teeth before

Sorry OP that sucks, but you'd be amazed at what people don't know:Laundry, Dishes, Making toast(this was on here), Public Intoxication of non legal substances ( also on here), dating your friend, boss, co worker mostly likely will end bad, one night stands (getting more dangerous), smoking pot in your parents house, not locking doors to fool around ( or in open view) the list goes on. Though the fact basic hygiene was beyond him at 23 doesn't look good. Better make sure he does laundry as well and showers with soap.

At least now he will have fresh breath. It's always helpful.