Man with a crushed testes or severed penis is not to marry a Jewish woman.
‘He whose testes are crushed or whose penis is cut off shall not enter the assembly of God” Devarim 23:3
If they transgressed and married a Jewish women and were sexually intimate with them they deserve lashes.
Such a person may marry a female convert to Judaism.
Even a Kohen with crushed testes may marry a female convert.
The term” with crushed testes” denotes a person with one testicle, or tubes of the testes that were wounded, cut or crushed by incident of human hand.
The term “one with severed penis “means a person whose penis was cut, crushed or wounded or whose top of his penis or part of it was severed by human action but not by Heavens hand.
If it was by Heavens hand he is accepted to “enter the assembly”
This applies in all places and all times.