Medical fetish has always been an interesting one to do calls on. Doctors, nurses and exams, sometimes even painful ones, are the order of the day. One caller that has phoned a few times is very much into getting things inserted into his penis and having it stretched open and looked into by the doctor. Ones do use the sexual implements sounds, long, metal rods inserted down the cock that can stretch the penile opening.
I’d think that an uncomfortable thing to go through, but they are very happy to get stretched and talk about it as they jerk off. One caller likes to have it stretched open so much that you then flash a pen light’s beam into the opening to get a really good look down in there. They often like to talk about becoming sexually aroused against their will, getting hard and erect, apologizing to the doctor, who of course reassures them it’s natural and common for that to happen, the nurse measures their penis in the flaccid and erect state and assists them to orgasm and collects the sperm sample and takes the volume down in their chart.
Sometimes prostate exams come into it as well, how ones could be aroused by medical procedures is beyond me, but some have very specific medical fantasies, even getting into artificial insemination and sperm collections with assisted masturbations, or showing the doctor how they masturbate and giving them details as to how often, duration, semen output, all the little details.