This is going to sound simplistic and crude, but make a rule for yourself. Tell yourself it is ok for you to see an SP but only if you still want to after jerking off.
At the very least that should significantly cut your spending.
Actually fuji already hit it on the head. This does work. I remember one time looking at porn and getting excited so I wanted to book an SP. As I was trying to figure out which SP to see, I started to jerk off and next thing I knew I no longer wanted to see an SP anymore :eyebrows:

