In addition to Houseboot's second informative reply I mentioned on one of the attached links that the Truro place in question is strictly legit (or so I have found on numerous occasions.)
There was a Chinese Dr in Truro who provided extras but has been shut for about 10 years. The Chinese place near Camborne closed about 4-5 months ago.
I sadly don't know of any other Chinese, Thai or indeed Japanese massage with extras in Cornwall. It's not through a lack of trying by visiting each one several times but to no avail.
Click on the Truro massage link, make an appointment and get yourself a very good but legit massage. Enjoy.