There was a time not too long ago where simply being gay was considered to be not only a “sexual perversion” but also a “paraphilic disorder” by the psychiatric community.

That was a brief time well contained within the 20th century.

out of curiosity what are the forward steps?

For those who have no idea what you are talking about.

Nazis rifling through books about sex and gender May 6 1933:

which were disposed of thusly May 11, 1933:

• Institut für Sexualwissenschaft - Wikipedia
• The Burning of the Books
• LGBTQ Institute in Germany Was Burned Down by Nazis
• The Forgotten History of the World’s First Trans Clinic