I tried it. My results were a bit inconclusive. I don't think it actually increases flavor UNDER the tongue, but something about trying to do it properly caused me to like, inhale for longer, perhaps, and then the vape escaping from under my tongue sort of slowly... it
maybe made things flavorful for a longer period of time, but IDK.
Also, wear dentures, might be a cofounding factor.
It wasn't BAD exactly and also I think focusing on the TECHNIQUE would HAVE to increase the SENSATION of flavor, until you got used to it. That is called mindfulness, and it is a powerful tool, and yet it is not the experience that is changed, but rather the nature of how one experiences the event is changed.
Agree, would not work for unflavored juice
Anna