I must say that I am not a little horrified to read this thread.
The very idea that usage of University students for sexual gratification is now considered unwholsome in the RAF makes me wonder what the world is coming to.
Surely the RAF initially set up the UASs for the same reason that the RN set up the URNUs in 1908:-
To quote from BR 1992, The Regulation of URNUs:-
"...so as to ensure that, in the unfortunate circumstance that an officer in an unfamiliar city cannot inveigle his way into the embrace of a lady of breeding and quality, perhaps due to time pressure or the pox, he will not feel pressured to frequent houses of ill repute with their inherrant risk of meeting a member of the lower deck. Instead he may proceed without unseemly haste to an URNU, and be sure of a soft landing with some alacrity within the eager arms of a relatively well educated lady who is unlikely to charge"