How do i keep my penis hard during sex

I have sex every day and my girlfriend needs me to stay hard. I always feel like i'm going to come when i'm on top and need to slow down, then speed up and the begin to %%$^%^ her hard. she wants this. she says she needs me to $##$%#$ her hard for at least 5 to 20 min. every time i try i feel like comming and or my penis gets soft. If i do doggy style i can go longer or if i play with her clit. but she so unsatisfied and needs me to $%56$% her hard and stay hard while on top. can anyone help?

how can i stay hard longer.i see those porn movies and they go on like nothing.somethime i feel my wife is not done,because i can finish quick,i decided something meke her get off doing oral sex and them i go.but some time she just want to go more.any sugestion please

dose blood pressure pills have any thing to do with this

You might try a cock ring. It helps the penis retain blood which causes the erection in the first place.
It can not be left on too long. I would read about it before I used one.

Well usually if your enjoying what you are doing it should stay hard. If you having trouble you may have a problem. It could be from a few things. 1. you may be haveing a physical problem. It isn't un heard of but you should go to a Urologist. 2. It may be something pyscological. You may see a therapist but that comes after you see a Urologist. The Urologist should see if there is a physical problems. 3. Most obvious answer is maybe you just aren't enjoying what your doing. Maybe the girl isn't attractive or isn't doing what excites you. Look back at your sex life and think about what made you hard. Try to repeat that. If that doesn't work refer to answers 1 and 2.

try this i promise it works better than any pill....1 hour before you have sex drink alot of water till you have to piss real bad but dont piss just have sex and you'll stay hard until you pee and make sure right before your about to cum pull out squirt in a rag then start over you'll have that morning wood effect until you pee i promise this works if it do or don't facebook me @gerald mallory...tell me about it...