A monster is convicted on 37 counts of sexual assault, including rapes and kidnapping and gets 33 life sentences, but only has to server a minimum of 30 years. He'll be 64 if that is the case so will still sexually active / capable and therefore still a danger.
A man's life is about 70 years so 33 is 2,310 years. I might let him out with 30 years off at 2,280 years or, if he accepts chemical castration, on the day of his funeral, whichever comes first.
Life should mean life for some crimes, even with one sentence.