Sure it can mean different things to different men....we all watch different movies
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I normally look for a GFE session. Every once in a while a session turns PSE (at least in my own mind) Sometimes it is with my GFE lady gone horny, sometimes with someone more inclined to PSE in the first place. It is (to me) the intensity, the gusto if you will and the activities themselves. Fawn, I think you have a pretty good list of what might be PSE...COF, TUMA, a number of positions, etc. And I am sure my bretheren here can augment the list. As I say I am normally a GFE kind of guy....BUT the sessions I categorized as PSE were fabulous. And I am looking forward to the next one.