Reddit reviews Sexuelle Gebrechen, Deren Verhütung Und Heilung: Für Ärzte Und Laien; Vom Standpunkte Des Praktischen Arztes Beleuchtet (Classic Reprint) (German Edition)

You will have to dig deep, my friend.

That is the problem with topics like these. Nowadays, self-proclaimed "experts" will just claim it's "pseudoscience" and "outdated" and that's it. No questions, no discussion, nothing. They will outright avoid the topic.

I can just recommend to read old books about sex and the sexes, about ejaculation, masturbation, biology, nervous diseases ... whatever might be connected to ejaculation in any shape or form.

The books I have read are mostly German, but I will provide links anyways:

https://www.amazon.de/Die-Frauenemanzipation-ihre-erotischen-Grundlagen/dp/B00428KVYG

https://www.amazon.de/Geschlecht-Charakter-Prinzipielle-Untersuchung-Classic/dp/1332358160/ref=sr_1_1?s=books&ie=UTF8&qid=1535762939&sr=1-1&keywords=Otto+Weininger+Geschlecht+und+Charakter

these are the 2 main ones. Both are quite long, the first one containing nearly a thousand pages about many different topics. Since the authors used sources it was quite easy to find more material to read. I forgot the name of one very important author but will write it down (including a link to his book about ejaculation) the next time I read about him. Sorry if I seem lazy but I'd rather not read all the 900+ pages again just to find his name right now. I'll save all the links I do find in a text document from now on and might post an update in a few months from now. Never thought that anyone cared about this really. It's a surprise to me that people are so "woke", and that subs like this one here exist.

​Edit: Someone posted this here. I've read this before but in German. Someone seems to have translated it? Not sure. Very great though, should read it.

​Edit 2: https://books.google.de/books?id=0X8vDAAAQBAJ&pg=PA173&lpg=PA173&dq=L%C3%B6wenfeld%20masturbatio&source=bl&ots=i4NTdIVKoU&sig=dwE5V-8nIyHy_k-W9KDrqD-KD5Q&hl=en&sa=X&ved=0ahUKEwi7i47Fme_bAhXMjqQKHXKyA-QQ6AEILDAA#v=onepage&q&f=false the names are "Hermann Rohleder" and "Löwenfeld" ... sadly there are no translations available, as far as I know. But this is a gold mine, it's a book with a focus on masturbation and its repercussions. You might translate it via some translator?

Edit 3: Krafft-Ebing and Samuel Réti might be interesting as well. Especially Krafft-Ebing has translated works which do contain the subjects of masturbation and ejaculation. Réti has one book called "Sexuelle Gebrechen, deren Verhütung und Heilung", literally called "Sexual deficiencies, their prevention and cure" which sadly has no translation as far as I know.