Hello English Rose most of the AMP ladies don't advertise what extras they do including full service but some do it based on the client and depending on how comfortable they are with it.
I know you are a private and not an AMP lady, but as a Customer I would suggest that if you are considering it then try it with regulars first and see how you go until you are ok with it.
If you advertise it then everyone will expect it and it may be awkward for you if you refuse them.
On the other hand It may also depend on how busy you are and if you did advertise extras it may get you more Customers.
Not much help I know but just a Customer viewpoint.
I see you have good reviews on here so I hope to make a booking with you soon.