i wouldn't worry about this too much. it doesn't sound abnormal to me. different things "turn on" different people. maybe oral sex just isn't your thing. you can choose to analyze this and possibly discover why receiving oral sex makes you feel tense or you can choose to focus on engaging in sexual activities that give you pleasure. that's how it sizes up to me. as long as you're not having other sexual dysfunction problems you can be pretty confident the lack of orgasm during oral sex is merely an issue of personal preference. if you find this truly bothersome i'd suggest seeking out a counselor or psychotherapist with experience in sexual dysfunction. he or she should be able to help you sort this out pretty quickly. all the best to you!
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'm 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?