Now I am 40 years old,since age of 21 I use sex n age of 32 I got married.Since strating of sex I was never able to make second time sex n its very badly affect on my marriage life.Just after one time copulation n its maximum time orgasm stage but on same night my dick is never erect for sex second time,so please help me,describing medicine or anything else.By the some times even I have used viagra catagory medicine but its all useless.
You are quite normal. Do not demand too much of yourself.
Instead of wanting two orgasms during the same night, delay the first orgasm and spend more time with your wife before intercourse.
Read more about satisfying your wife.