After chris was diagnosed with testicular cancer, he opted to have both testicles surgically removed. in terms of his ability to engage in sexual activity after surgery, we can reasonably expect that if chris receives an injection of estradiol, he will be able to perform sexually. there is nothing chris can do to regain the ability to achieve an erection. the more testosterone chris receives, the more sexual behavior he will exhibit. if chris receives an injection of testosterone, he will be able to performsexually.