This was a fascinating read, even though I'm not usually interested in the subject. afaik during bottom surgery for TIMs their nuts get chopped off.

The tl;dr is that the long term consequences of this practice are pituitary gland enlargement, the prostate disappearing, osteoporosis, urinary issues

It also got me thinking about how in the past men were forced into castration in order to serve others and now they're doing out of their own free will.

Also here's an ironic part (this was written in 1999): Hopefully, it will never again be possible to repeat the studies reviewed in this paper, as in more recent times we have used different means of expressing man’s inhumanity to man. It is to the credit of the pioneering physician scientists involved that useful medical information was obtained about the long term effects of castration, under circumstances that must have been difficult, from the study of these now extinct groups of castrated men