The human body can change in a number of ways that will result in the affected individual holding their hand up by their mouth as if they were giving a blow job. Here is a picture of a man giving a blow job with his left hand gripping the penis.
To prove the contention that performing blow jobs like the example man is doing, by holding the penis with one hand, will change the body so it always tends to hold a blow job giving posture, the next picture shows a porn actress at a public event.
The woman is holding her hand up by her mouth just like the man giving a blow job is holding his hand up by his mouth.
Obviously because the woman is at a public event she would not consciously or purposefully be acting like she is giving a blow job. So it seems reasonable to accept the claim that her long term physical behavior as a porno actress has changed her body so that she tends to act like she is giving a blow job all of the time.
That phenomenon can be used to inform the discerning observer who is likely to give blow jobs and who is not. All the observer has to do is notice people who are holding their hand up by their mouths as if they are performing a blow job, a hand gesture that is known as “The Sign Of The Blow Job” in Happeh Theory Nomenclature.
As a test of that ability, please look at the next image.
The man is holding his left hand up by his mouth,
so it is likely that he has given blow jobs with some frequency during his life.
If the man’s picture is compared to the man who is actually giving a blow job,
the similarity between the posture of the two men is so strong that it is almost a certainty the example man gives blow jobs. Or his body could possibly have been changed by some other activity that has the same impact on the body that giving blow jobs does.
Here is the next example man.
He is holding his right hand up by his mouth,
in a way that is suggestive of someone giving a blow job.
Comparison of his image to the man actually giving a blow job again shows a strong similarity.
That strong similarity means the example man either gives blow jobs, or his body has been changed by some other activity in the same way giving blow jobs changes the body.