Some people think it is proper to never smile or laugh (or show teeth), as it's considered rude in proper company where it appears that one ought to be staid.
I used to think the same when in galleries, when I was 16, a few decades ago.
Reading some other CH responses when people did giggle, or laugh (thinking of whatever) made me think of this. My husband and I are often out giggling. Something sets us off. Sometimes we have to leave the room. Other times we don't care.
Then there's propriety--do you dip this in that, or not? What about adding the sauce? I'm not talking about State dinners, when one looks around first to see what's proper (don't drink the waterbowl for dipping your fingers in, for example), but simply enjoying the food. Dip (and double dip) communally, if it's only the 2 of you? Using the crepe naan instead of the other raised naan to sop up the saag or experience other taste experiences?
Husband thinks it's a complement to the chef to try things in all ways. I'm half and half--I want to do all, but know that depending on the establishment (and company), it may be considered rude. While I don't know all of the particulars regarding pasta and their sauces, I do know that certain sauces are to be served with certain pastas because they complement one another better, and will defer to the chef (usually).
And then there's bread. I've heard both regarding mussels and the broth (I do sop up the broth myself, because it's a waste otherwise).
Of course, taste the food first. If there's bad or weak pho, add more seasonings. If it's perfect, there's no need. In this case, I don't care if I'm offending the chef--in a sense, he (she) should be made aware that this partiular patron didn't have something tasty!
What do you think?