Can a man get a hard on after castration?

The only prospective I can give is long term chemical castration. my hormones are at castrate levels. I can still get an erection and ejaculate. But it's much more up to her, and being with her. There's no interest in an erection when I'm alone. I can only have 'normal sex' once or twice a week. This all varies from male to male. In a large percentage of men the ability to have an erection is gone after 1 to 5 years; in some its matter of days. The younger you are when your castrated the more likely you are to be able to perform the following years unless you were castrated before puberty.