 [ Symptoms ] when it comes to sexual activity i have no probelms ejaculating except when she is preforming oral sex why is this  with all other types sex hand job or self masterbation i am able to easily reach orgasm but when a girl is giving me oral sex i seem to tense up all muscles from my butt to my calves why is this and is it normal [ Disease ] hi yes it could be arthritis have a read on www eartclinic com just look under ailments at things under a but have a good read at cayenne pepper and turmeric this can both help with relief two sites your find below <link> <link> this one you will find help on its down the right hand side for pain relief just copy each into google one at a time to the www to open and read hope you find the help you want good luck