Just throwing my own 2 cents in. Expanding on what Rudgar and Aztlan suggested, if you feel crafty with writing you own dialogue, you can easily combine Dialogue Actions with Dr.Zombi's "More Triggers" and rig together a system that will take the girl pleasure variable automatically generated and turn it into a graphical display in the form of a progress bar. I'm using a similar system for my currently unreleased project and it's pretty aesthetically pleasing. I can post a screen shot if requested. This of course will only work if the girl is masturbating, if you are wanting a system that takes into account sex "scenes" or pleasure generated from the main oral aspect of the game, that would require a little bit more trigger writing, but totally not that hard. Hope I could shine a different light on the subject! Have fun!