I'm surprised that you're surprised at the nonsensical elements.
The original deep throat title porn from 1972 starring Linda Lovelace.
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Actress Linda Lovelace is distraught with grief, when the doc in the pic examines her throat and reveals the bad news to her that she was born disfigured, and that her clitoris is located in her throat, which explains why her enjoyment of sex isn't optimal.
Fortunately for her, the man is very generous and attempts to help stimulate her clitoris with his penis.
Also there are countless american porn titles, in which a woman is sick in bed complaining about her sore throat.
woman: my throat is in so much pain!
perverted man: I have a secret cure, but you'll have to trust me. Close your eyes and open your mouth.
She trusts him. She feels the pain worsen, and opens her eyes and learns why the pain is worse. a large cock is being violently shoved in and out of her sore throat.
woman: are you sure this will help me? It seems to be making it worse!
man: SShhhh, only at first. It will take effect soon, don't interrupt the healing process.
Generally, I think most of the time you wouldn't be confused. You probably had a brain fart, and got lost in the sheer nonsense of the blood pressure rationale. The tiny nonsensical details regarding blood pressure distracted you from the big picture, which is:
An eternal theme of JAV is when a man tricks/ bamboozles a woman to allow a man to ravage her wet tight throat. Your comment about helping her with her blood pressure is absolutely congruent with women being defrauded and bamboozled into choking and gagging indefinitely, which will not end until a condition is met. Until the parasitic being inserted into her throat experiences an irama induced orgasm.
You probably trolled me into spelling this out I think, so in reality, I'm the bamboozled one, lol.