I don't drink like that and I don't use a glass that's bigger than my head.
Sucking some air through your mouth is so you aerate it and also get some retronasal things going. OK if you're home alone. If you're at a dinner, it's just rude. If someone does that, put some potatoes or food into your mouth and do the same thing. Then spit it out.
Kinda' like this?