After orchiectomy you will no longer produce testosterone and MUST take some kind of hormone replacement. If you do not, you will be severely hypogonadal and will suffer menopausal symptoms including hot flashes, sweats, depression, and weakening bones. You do not produce enough "adrenal" testosterone to make any measurable difference. After my surgery I had to stop my estrogen for about six months because they thought (wrongly) it was giving me migraines. During that time I did not become more male, but I lost some breast volume and felt horrible. They did a bone scan and found out I had lost an alarming percentage of my bone mass even during that short time. Once I was back on estrogen I immediately felt better and all of the adverse changes improved. I plan on being on HRT for most of the rest of my life, and you should, too, if you are considering this surgery.