I have this orgasm without ejaculation things often. I dont know whether im infertile or im just not masturbating properly. I probably should give my little bro a rest.

Im sure its perfectly normal....Only 65% of woman actually ejaculate when they orgasm, so im sure not all 100% of guys do either....If you're that worried then I would go see ur doctor and see if theres anything he can do....Good luck!