<human>: My boyfriend has some real issues when it comes to me "criticizing" him in any way. I know this comes from the way his dad (who's very narcissistic) criticized him constantly when he was growing up. 

Any time I say anything that he perceives as critical he gets sulky and defensive. At this point with 95% of things I just don't even say anything. If it doesn't directly effect me I keep my mouth shut. And I'm generally fine with this, because really I don't need to have an opinion about a lot of things. 

But there are two things that I really feel I should tell him. The first is his breath. I don't know what's changed but over the last two weeks his breath has been really bad. Other than the offensive smell this doesn't effect me, but I also don't want him to be embarrassed if say a coworker tells him. 

The second is that he is doing something that is really damaging his car, he shifts out of reverse with out completely stoping. I can feel the clunk when it hard shifts, and his car is beginning to have transition issues. I love him, and I don't want him to have to go through having to pay 1,500 to replace the tranny on a car that's got 40,000 miles on it. 

I need ideas on how to bring these things up. I know if I say "hey dude your breath stinks, I love you!" He'll react badly... The only idea I have for the car is saying I found an article on Reddit blah blah... But even then it's a gamble.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: my boyfriend has bad breath and is breaking his car. He's overly sensitive to criticism from me and I don't know how to tell him.