A lot of fantasies seem to revolve around things being done to penis, preferably when it's in the erect state. I think there's a story developing here ...
There's a woman at a university in U.S. northeast who has devoted herself to research into the mammalian penis - its microstructure and erectile mechanisms. She's become a bit famous due to the unusual nature of her research focus, combined with her gender. Discover magazine covered her, a good article in my opinion, and written by a woman of course. Reading about two women discussing latest penis research is hot stuff, in my opinion.
Her research subjects often come from rodents and 9-banded armadillos who tried to cross the highway without looking both ways. I'm not posting her name here but anyone with a little Internet search practice can find her.
So in my imagination her career is her way of expressing a well-controlled fascination with the male member, in a socially-acceptable way - of course she would prefer working on those of her own species, but certain social constraints apply, particularly when your research entails removing the male members and then hooking them up to sensors and pumps in the lab and inducing artificial erections.
So imagine she settles for the next-best thing, finds trusting (maybe adoring) man who permits her to stimulate him to erection repeatedly, and she watches closely and studies his erections, attaches all sorts of equipment to his penis, etc., makes measurements and videos of the whole process, from flaccid to super-hard erection.
Maybe she sometimes secures him to the table top, plays gentle slightly threatening games with her scalpel, saying she's going to remove his, now.
In her Discover interview she ends with speculation about how science doesn't fully understand how the penis launches ejaculations with such speed and force, as if she would like to make this her next research focus; she says "These are experiments you can do at home", as a sort of little joke, but clearly indicating she's thinking of the human version, not armadillos.
Thinking a story might come out of this, guy with my proclivities meets her for a date and ends up as her subject for a week or two of deeply kinky research. Stay tuned.
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