Not sure what that is, and the external stimuli isn’t the thing that makes the time difference for me. It’s whether I’m sharing the experience with some one. I’m much less able to prolong my session when I have somebody else providing additional stimulation with their pleasure. This said, ….. reading, pics and vids often are enjoyed from ½ to over an hour. Usually a “shared” cyber, phone or camming meeting will be ¼ tp ¾ hour. It only seems to be “WITH” a friend that the play will have an act II within less than ½ an hour.

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