OK, not necessarily something you want to do in public. But both a good way to learn a little more about the beer you are drinking and your own senses.
I was reminded of the value of tasting without first smelling while grinding through an academic paper related to hops (I try to tackle several a day because I have quite a collection). In this case the researchers were evaluating the bitterness intensity of various samples, and panelists wore nose plugs.
No need to do that at home. A simple squeeze will do. Take a sip without the benefit of “olfactory influences,” then one with. Or vice versa. Doesn’t even have to be a hop-heavy beer, although the results can be pretty interesting with a dry-hopped one.