As we all know, every girl in the spa's we visit have their own skills / or lack of it for a handjob during a massage, some just grab and tug away as fast as they can so that you cum quickly, others do a bit of sensual touching and a slow tug and build up.
I once asked a therapist if she ever gets turned on doing a handjob, she replied " No its just a job for me to earn money !! I am pretty sure some DO get turned on, but I guess when they are perhaps doing 5 to 7 happy endings a day, it must become routine for them.
I had a massage a year ago with a new girl from Thailand, when she carried out my happy ending, she commented that I was the first guy she massaged that was uncircumcised, she seemed curious when pulling back the foreskin and played around a bit, I reckon she was probably new to massage since her massage was crap, and so was her handjob.