There are a number of MPA's in the Toronto area who will do different kinds of role playing depending on what kind of experience that you are seeking.
I am reminded of an experience at the old Bloor Street Spa on Walmer Road, near the corner of Bloor/Spadina.
The owner at that time was an amateur interior decorator (this was long before Trading Spaces and the various decorator shows that populate TV these days.) She had decorated each room in a different theme, one room was based on a safari theme, one had a music conservatory theme, I think you get the idea.
One room was decorated in in a powder blue, with a large basinette type sheer hung over the head of the table. The first time I saw "Julie" she asked me if the room reminded me of a baby's room. She then proceeded to role play a 'Nanny and the Baby' session. She oiled me up, massaging and playing with my feet, toes, fingers etc. She then 'accidentally' got oil on her blouse. She removed the blouse (surprise no bra, very nice pair of 34C's) and continued the massage, cupping my balls from behind, teasing my asshole, and rubbing her tits all over my ass.
Next she rolled me over, all the while telling me that baby needed to be properly oiled and fed. She offered her breasts for sucking, while gently caressing my chest and hard cock. She continued to tease my cock, while telling me how much 'Nanny' wanted to see her big strong baby come. Within seconds I was coming, shooting all over my stomach.
Needless to say, I began to see Julie on a regular basis. Unfortunately the owner eventually found out about "the baby room", apparently after a number of clients requested it. The owner was not amused and supposedly fired Julie and immediately re-decorated the room.
Infantalism is not my thing, but the way Julie did it was so completely erotic that it remains one of my best memories of massage in TO.