You can get immediate NHS treatment if you state that you have returned to live permanently in the UK, and can provide some evidence (if asked), such...
I was about 5 for many years, but after getting stuck in Laos for 2 years and unable to have a PSA test, the number was 11 last September and then 14...
According to the likely side-effects of the operation, trying to have sex will be like trying to stuff a marshmallow into thin hosepipe.... no chance...