I have had erotic massages that I would define as sensual (very little MT if any, massaging my genitals but no HE) to 'full service' (whatever 'service' I wanted from the masseur, he was open to providing). So the definition is not really defined by the client or any website - it's defined by the provider himself. Ask him up front what 'erotic' entails vs 'sensual'.
A little side note: About twenty years ago I bought window blinds from Home Depot, with a 'lifetime guarantee' for free repairs or replacement. Within two years, one of the window blinds were not working properly, so I called their service department (with all my documentation in hand) and asked for a service rep to come out to my home to repair or replace - for free. They told me my 'lifetime' guarantee expired - they defined 'lifetime' as 12 months. So they were really offering a one-year guarantee on their product, but falsely advertising it as 'lifetime'.
After hanging up from them, I called the consumer division of my state AG's office. I provided them with all my receipts and paper work guaranteeing me the 'lifetime warranty'. They quickly resoved this with Home Depot for me - and let them know they can't advertise 'lifetime guarantee' in our state if it's only for 12 months.