Castration removes the testicles. Folks who have been castrated can buy black market testosterone to function. Some times the perpertrator asks for castration as a way to avoid prision and knows the ways to get around it.
Saying you want to castrate folks is more a punishment fantasy rather than a workable solution.
Bingo. The freaks are scary intelligent when it comes to finding ways to get around the system. Hormones to get around castration, "therapy" to get around prison, special wards in prisons to stay out of gen pop, etc
Torture, while amusing, is not a valid solution. It's not legal, nor should it be. A very nice .45 FMJ projectile to the brain stem is the best solution for clear-cut cases. For some cases, it is the only solution that works. Therapy, chemicals, prison, etc are not perfect solutions. It often just teaches the freaks how to correct their mistakes.
Rape and child molestation are worse than murder. When someone is murdered, their soul is free. When someone is raped or molested, their soul is in hell for a long, long time.
As someone else said, for less clear cut cases, there needs to be room for mitigating circumstances. Manditory sentencing is a very very bad idea, and I'm not sure how it is legal. We've all heard stories of some young lad that is underage himself annoying the parents of a young lady that also underage, ends up with the boy being labeled as a sex offender. Or the common 18 year old with a 17 year old, or equivilent.