Actually, he is not the only one I have influenced. My roommate is a hypermasculine, bearded guy who does bodybuilding. I gave him injections too. At first he noticed gynecomastia. The doctor told him it was because of steroids, but he never took steroids. The doctor prescribed him tamoxifen, but it did not help, his breasts continued to grow. His results in the gym stopped progressing, and then began to decline. He gained more subcutaneous fat.
All this upsets him greatly. Estradiol made him sentimental, so he cries constantly because of it.
If you are a macho, you should stay away from me. If you want to smash my face, during a fight I will inject you with estradiol undecylate. Your E will be high for at least 10 weeks, during which time your breasts will grow, sperm will disappear, and your own T production will be disrupted.