Stuart Hall "took advantage" of young girls after they were sick from drinking spirits.
Jailing him, Mr Justice Turner said Hall volunteered to clean them up but his intentions were 'much darker.'
He said: "You saw their condition not as a cause for concern but as an ideal opportunity to carry out acts of gross sexual molestation while they were at least partly incapacitated by drink."
The judge told him if he had committed the same offences now he would have faced a further eight years in jail but his "hands were tied."
More top news
The SNP supporters who voted against independence, and nine more interesting snippets from Lord Ashcroft's unofficial "exit poll".
Jimmy Sinclair, who has waited his whole life to vote for independence, told us he was "disappointed" after the 'No' vote.
Photos from an historic day in Scotland's history as voters choose to remain part of the United Kingdom.