What do you think about opening gifts at a party?

I thought of this question because of another recent question about a bridal shower.

I hate the practice of everyone watching while you open the gifts. If I invite you to a party it is not only so I can get a gift out you. I would hate for a friend to feel uncomfortable because they were tight on money, and worried about being embarrased they could not afford an expensive gift.

Where did this custom come from?

We do it at childrens parties and showers for the most part. We don’t do it at weddings and other parties usually, but I guess it depends on the situation. In the past I have opened gifts people have given me on the spot so to speak, when a gift was not expected at a party I was giving, so I could thank them at the time, but not with everyone around staring.