A team of sixteen of our PhD scientists got together and came up with the following self-test. Take it honestly and see how you "measure up" to our experts' insights.


1) Ideally, I masturbate: 2) When I have an erection, I: 3) If I look at a member of the opposite sex and feel excited, I 4) When masturbating, I 5) Upon ejaculation (if applicable; if not, see Jack FAQ question 2) 6) I enjoy masturbation because: 7) I use the following to aid my masturbation: 8) How long from beginning of ejaculation until end? 9) In order to mentally stimulate myself during the masturbation experience, I imagine: 10) The place I most commonly masturbate is:

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