At very rough estimate, I would guess a 30 gauge needle. They have an outer diameter of .31 mm. A blood cell is about 7 micrometer across. It looks like you can fit more a smidge fewer than 50 cells across the thickest part of this needle. Cheers!

If you have time for a podcast, ScienceVS has done two episodes on trans people with well researched citations. The more recent episode looks specifically at the issue of bullying and negative trans experience. Hope this helps. Cheers!

According to one urologist named Dudley Danoff, from a MEL Magazine article, it is not something that happens. So, while this is just one doctor’s report over a lifetime of patients, this would seem to indicate ejaculation during a prostate exam is exceedingly rare. Hope this helps. Cheers!