Octavius, that used to be the expected enforced solution. You may imagine how badly it worked! I will try to put the next bit as tactfully as possible. People who have learning difficulty and the mental age (hate that term) of a child may also have the outlook and impetuosity of a child too. Imagine that coupled with the sexual development and needs of an adult...a very difficult and unhappy circumstance. 30 or so years ago I was involved with a day centre for people with moderate to severe learning difficulty. It was quite advanced for its time and gave the clients as much freedom and choice as they possibly could. In the summer they would spend their lunch breaks (it was an employment centre) on the front lawn because that was where the sun was
Local men used to cruise the street that it was in and lure the clients into their cars...the problem was that there were some clients, both men and women, who wanted to go. They understood the pleasure of sex and wanted the offered sweets, but had no concept of VD or pregnancy.