Good experience at dentist's office, of all places

I got to talking with the dental hygienist and dentist after they scraped 6 months off my molars. Told him of wife visiting San Francisco, and, in a 'scruffy' area, wanted her gun handy. It wasn't.
The good dentist related a near identical story of when he was in that same city attending a national dentist hoe down. He felt the need of a pistol one evening.
He asked about my wife's gun, so, turning, I showed him the gun on my hip, and feeling no bad vibes, slowly produced it for him to examine. (He looked very interested)
edit to add: I have wife's gun as mine is in the shop. Wife is safe.
He said 'nice', and I re-holstered the Kimber Pro Carry HD II with Esmeralda grips.
No running and screaming, it was more like I was showing off a new phone, except they were interested, lol.
I wasn't pulled over by the cops and they haven't phoned so I think I'm in the clear.
They even gave an engraved invitation to come back in six months! They love me.
Did I commit any sort of gun etiquette blunder?

No "feelings". You should have asked him if it was OK for you to remove it. His answer would have cleared any hesitation and questions for you.

I had a discussion with my dentist. I asked him if he would defend himself if he was being robbed. He said he would just hand over his money.
I asked if he would defend his wife from being raped. He said he really didn't think it would ever happen. I suggested that probably every woman that got raped thought it would never happen to them either.
It got kind of quiet after that.

True story.

I was in the hygienists chair getting a checkup and cleaning while visiting Florida last year. The doc and I are old friends.

Hygienist leans in and quietly says, "Doc says you are packing, is that true?"

I lift up my shirt and carefully pull out my pistol.

She smiles, turns and shows me her pistol under her white coat.

Florida, what a state. It was hard making the transition back to CA after being there two months in CCW mode.