hello: i can no longer masturbate or have sex without a dizzy spell shortly after starting. i used to only have the spells after masturbation, ....but over the last day or so now i can't even finish. i wonder if this is blood pressure getting too high. i had thought before that it may be from the drop in bp afterwards. i don't seem to get the symptoms from daily activities that may cause just as much work on my heart. if not bp, ....could it be from the heart only during sex, .....and not regular exercise??? any ideas???? help!!!!