My spouse were involved in an intimate encounter yesterday (last night). Although it took a while, I was able to achieve an erection however, regardless of the time SHE devoted, or the numerous different ways she attempted, I could not ejaculate and in fact never even experienced the orgasm experience. I/we were not arguing with each other, there was no tension and we had nothing but time to devote to our attempted sexual experience. Would you PLEASE tell me how this could happen to a 55 year old male who most other times has no problem with masturbation or ejaculation?