Why Drinking Alcohol Through A Straw Might Not Be A Good Idea - Tasting Table
Briefly

Drinking alcohol through a straw increases the amount of air ingested, which can cause bloating and discomfort, especially with carbonated drinks. Using a straw tends to hasten drinking, making people guzzle drinks, order more rounds, and potentially reach intoxication faster even though absorption rate is unchanged. Straws bypass the nose and reduce exposure to aromatic compounds, dulling flavor perception because taste depends heavily on smell. Drinking alcohol through a straw can also appear socially unusual in many bar settings. The practice can therefore worsen physical effects, diminish sensory enjoyment, and alter drinking behavior toward heavier consumption.
Sipping on liquor with a straw is actually more harmful to your body than you think; the act isn't a good idea for both taste and physical reasons. Washing down a meal with a bottle of beer by using a straw can make you bloat more due to the carbonation, and can be uncomfortable as more airflow is ingested with the alcohol.
Utilizing a straw to swallow the liquor is also a big no-no because it can hasten the pace at which the drink is guzzled down. This will surely lead to wanting to order more rounds of cocktails more frequently and theoretically can make you drunk faster. It will only make consumption more accessible but won't change the speed in which your body soaks up the alcohol.
Slowly sipping the liquor from a glass cup will let you taste all the flavors at once and will allow you to smell the scents present in the drink. According to science, what we believe is taste, is in fact derived from our sense of smell. But when a straw is used it will detour this process and can dull the aromatic notes.
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