My younger brother's two oldest children are boys. Years back, they had a dog who wouldn't stop barking. An electronic dog collar was purchased to try and put an end to the non-stop barking. This collar was designed to give the dog an electric shock every time he barked.
The oldest boy decided to test the collar on himself. He put the batteries in the collar, placed the collar to his throat and barked. He was "shocked" at the severity of the electrical shock. The younger brother did not think the shock could possibly be that strong, so he took the collar, put it to his throat and barked. Needless to say, he put a little bit more trust into his brother's judgement.
The point of this story is to tell you that most guys do things without thinking them through. If a group of guys are hanging out and someone brings out a knife and says," Boy, is this knife sharp.", at least one other guy will test it. If someone touches a stove and says,"Boy, is that hot.", at least one guy will want to judge for himself. If someone says,"What is that terrible smell?", at least one guy will voluntarily take a good whiff.
I, myself, have done all the above. The one thing I don't do anymore is purposely smell a fart. When someone says,"Who farted?", most people immediately sniff the air and agree that someone farted and yes it does smell terrible. The gas molecules that literally seconds before were in someone's anus, laying on top of someone's feces, are now voluntarily drawn up someone's nose. Think about this the next time you smell a fart.