While a daily low-dose aspirin can slash the risk of heart attacks and strokes in those with an elevated risk, it can also cause dangerous bleeding in the stomach and intestines. Drugs called NSAIDs, which include ibuprofen (Advil and generics) and naproxen (Aleve and generics), can magnify that risk.
Yawns can be caused by boredom. When watching an uninteresting performance, movie, or recital a person may have a bout of excessive yawning. To suppress the yawns, he can hold his mouth closed tightly and clench his jaws. When the yawn comes on he must keep the pressure in the rear of his jaws and swallow the yawn. Excessive yawning, caused by sleepiness, can be counteracted by drinking lots of water. Dehydration is a big cause of fatigue. When a person drinks a lot of water, the yawning will cease. Every time the urge to yawn is strong, drink a big gulp of water and the yawn will pass.
Same reason humans do. Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. We know it's involuntary because we do it even before we are born. Research shows that 11-week-old fetuses yawn. Although scientists are still trying to determine the exact cause of why we and other species yawn. There is a general thought that is a way to increase oxygen to the brain/body and is generally relaxing.