Hi doctordoes masturbation have a side effect?does it make the person ejaculate too soon?or make him emasculate......................................

No, No and No: Masturbation is perfectly natural. It is the best way to learn your own body (what you like/don't like and how it works). You can actually learn to prevent premature ejaculation through masturbation as well. OK, one side effect- it can be messy but that's also part of the fun! Most professionals agree that unless it interferes with your ability to perform with a partner it is perfectly normal.