I've also had both testicles removed and I been on a topical gel testosterone for 2.5 years. Sometimes I feel great other times I get the hot flashes you're describing or I get really moody.
Hormone replacement is not, in my opinion, as easy as it looks in the textbooks. From reading this forum, I've noted a wide variety of reactions form different guys to different forms of hormone replacement. Sometimes it takes a bit of trial and error to det the dosage correct. I would talk with your doctor about your symptoms. You may need to vary the dosage.
If your hormone replacement is adjusted properly, all your equipment should work
Best of luck,
Right I/O 4/22/1988
Left I/O 9/17/2003
Tho' much is taken, much abides; and though we are not now that strength which in old days moved earth and heaven; that which we are, we are; one equal temper of heroic hearts, made weak by time and fate, but strong in will; to strive, to seek, to find, and not to yield.