i've always tried hard to please women sexually, its very hard to please some women, even when you have cock like i do. i never give up because for me its an objective not a win or lose situation, even if i get nothing out of it i still commit to impress her if has to be done in a very difficult or simple sex position.
usually i dont have any problem with hitting a cervex but a few years ago i met a women who wanted to have sex and time after time i found it extremely difficult to hit the cervex. it was so frustrating, though like i said i never gave up.
sometimes it easier to let do all the moves, if you have trouble having an orgasm, just let her be in charge and ride you for a little while, tell her to go hard fast of slow and gentle, its good to change the tempo from time to time, it keeps the momentum going and sustains you till you shoot the cream in shit loads. remember to let her please tou first, dont please please tour self initially.