Go and read some reviews on the 278 girls, they all do CIM, some are better than the others.
Basically I was brought into the world of CIM by an ex-gf who could suck you dry as you cum into her mouth. Like a black hole for cum.
Would love to experience this again, but the WL that I've gone to for CIM just let you literally cum in mouth, maybe with some tongue work but nothing that would squeeze your balls dry.
Tips and recommendations? Or is this all that I should expect from WLs? Am I taking my punt to the wrong places for this?
Go and read some reviews on the 278 girls, they all do CIM, some are better than the others.
Like anything related to sex, some girls do it "better" than others. Shop around till you find what YOU like.
Time is the biggest factor, most girls want to get it over with ASAP, so they can move onto the next routine (or customer). Cooperative GFs or FWBs are the better experience if you are not time wary. You can train them.