Suggest Remedy For Asthma Attacks After Attaining Orgasm

Hi there I have mild asthma that is well controlled very really having attacks but over the past few weeks am having problems with masturbation and oral sex. I often masturbate but it is causing me to get breathless and tight chested to the point when I can feel a attack coming on. If my wife masturbates me or profoms oral sex on me I last long but when I orgasm I am having a attack. She is rushing around to get me nebulizer set up and the mask on me as soon as I cum. I have tried taking my preventer before it but still have the attacks and need the neb. Any ideas please I hate seen me wife freak out when I have attacks as I cum. Many thanks