I am a little bit nervous to explain this but I am quite irritated now. I masturbate twice or thrice a day. Its pleasant but after ejaculation sometimes particularly once in a week I feel strange burning sensation inside my urinary canal. And thats not it. At the same time a strong desire and physical scenario occurs which is similar to feeling of pooping and when I rush to my toilet I don't shit. Earlier I thought it was constipation but now I observed its aftermath of that ejaculation and one more thing again if these things don't happen to me another problem is there after masturbating once I feel urge to masturbate twice after some time and then a strange itching occurs in my penis I think that my penis swells up and which insist me to jerk it and it feels good and it leads to masturbation five times a day. I would like to say that I don't feel weakness after any ejaculation rather I feel relaxed but some times these problem occurs which ruins every thing.