One thing I've learned: Men don't respond to hints. They just don't get it. When a man gives a hint, he'll give you a picture, a diagram, a dealer/manufacturer, and the price tag. Women tend to get coy and silly and vague . . . and our men just tune us out.
I didn't have the bad breath problem with my hubby, but when we got married he hadn't seen a dentist in well over five years. He also had developed adult-onset asthma but wouldn't go see a doctor.
I like to think of myself as an untypical female. I didn't get passive aggressive or coy or anything like that. I scheduled him a dentist appointment on a day and time I knew he was available (and I also scheduled a cleaning for myself on the same day). I then gave him the information in a very matter-of-fact way. Sort of a: "I made myself an appointment for a dental cleaning on the 5th, and they had an extra opening so I made an appointment for you, too. Here's the name and number just in case you want to call and cancel the appointment."
My hubby grumped a little bit about "hating the dentist" but he kept the appointment and has been faithfully going to his annual check-ups and cleanings every year.
The doctor's appointment was a bit more interesting. He WENT to the appointment, but refused to fill the prescription for the inhaler because he didn't want to be "dependent" on an inhaler. (Struggling and fighting to breath is apparently preferable?) I spent most of the summer walking around holding the phone wondering if I was going to need to call 911 because he was having such a tough time breathing. I finally went to the grocery store and bought an over-the-counter inhaler. He unpacked the groceries and found it. He looked at it and said: "Is this for you?" I replied: "I don't have asthma, babe." Then I walked out of the room without saying anything about it. He spent a couple of minutes looking at the box with a disgusted expression on his face. But darn if he didn't use it. After less than five minutes he started holding his chest and saying (with surprise) that the inhaler was working.
I could've bipped him upside the head. What did he THINK would happen if he used a medication specifically designed for asthma to TREAT his asthma attack?!?!?! Aaaarrrggg.
Anyway, he filled his inhaler prescription and that was all he would do for a couple of years. Last year he FINALLY started getting treated for his allergy symptoms and is now taking allergy shots.
I hope I gave you a chuckle through all of this. But my advice: Stop giving him hints. Make him an appointment. (Chances are he has some fear about the dentist.)
It also sounds as though there is something else going on. I'm wondering if he is insecure about your relationship. Is he afraid you're going to leave him? Just from what you've described, it sounds as though he is deliberately trying to push you away. I'm thinking that because he expects that you are going to dump him, he's trying to give himself some control over the relationship - He's going to turn himself into a pig and a slob to make you dump him.
Perhaps he just needs some reassurance that you're not going anywhere and you don't want HIM to go anywhere - so you want to make darn sure he stays healthy. (I'd focus on healthy rather than attractive.)