I Cannot Crack My Neck In General. However, When I

I cannot crack my neck in general.

However, when I have sex ... or umm pleasure myself right when I am cumming I HAVE to crack my neck ... it's like DEEP intense cracking ... and i arch my back and crack that too ... but mostly my neck. and I HAVE to do it or else it just doesn't feel good at all. It's been like this my whole life. My girlfriend is used to it now, but it's been interesting watching girls reactions as I crack my neck like bruce lee while spewing my load.

I've tried deep breathing and concentrating on not cracking my neck but the desire is just 2 intense and all i want to do is stretch and crack my neck as much as possible ... and again if I try to resist it just doesn't feel nearly as good ... i don't have a peak orgasm just the sensation that it's about to "cum" but never does unless i crack my neck. Any thoughts? Ideas? Opinions? ANy help is greatly