No, not true. I used to have a gallery of castrated trans women, which XH has now blocked.. There were about 20 photos in the gallery and in about half of them the girl was at least semi-erect, and in some of them, she was rock-hard
strangley the abilty to get hard isn't full conrtolled by having testicls. Some have the remove through desire other to help with the drug regime, no balls, no testosterone, less meds to take and balance. Ejaculate 2 part, sperm from balls and clear fluid from produced due to prostate. So the ejaculate will be less and clear. Was confused about whole thing, so did some reading ages ago.