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Originally Posted by baseball99 there is no cavity unless you are pushing them up into your abdome which is unlikely |
Just a friendly observation. I have always been able to do it, my best friend can do it.
We'll get the research published soon and link it here for baseball.
It's just a little space up there in the pubis somewhere that they pop up into. Several guys on this thread can do it, some spontaneously. Mine probably would pop in there and stay there if I was really freezing cold.