I frequently do it for a variety of reasons ranging from wanting the freshest fish to just getting the opinion of someone who has seen how quite a few people respond to different dishes. I tend to do it more at higher end restaurants since I expect the waiters etc to be better trained/experienced/informed. '

I almost always ask regarding wine. After we select food I typically ask the waiter/sommelier for suggestions in a certain price range which I tell them. This is very much the case at higher end restaurants. One of the things you pay for at high end restaurants is the knowledge and skill of the people working there.

I am not a child.

I just recalled my favorite experience of letting the people at the restaurant make a choice. It was my first time at Taillevent in Paris back in the 90's. The maitre de came over as we were ready to order desert. I confessed to being unable to decide over the many choices. He asked if I liked chocolate. I told him I "adored" chocolate. He said he would ask the pastry/desert chef to make a sampler of all of their deserts containing chocolate for me.