The glans of the penis is usually more sensitive than the shaft. It has more nerves and it can collect a larger quantity of blood. The solution for your problem might be very simple.


The entrance of the vagina is its most narrow part. Once the penis is inside the vagina, the vagina walls usually contract in order to adjust to the size of the penis. This adjustment might not be complete in your case. Also, too much lubrication with the vaginal-produced fluids might decrease the sensitivity of the penis. The problem is that if you try to decrease the lubrication the friction might be increased so much, that it might start to hurt your partner.


You might want to try to penetrate the vagina only a little, so that the glans is almost always at the very entrance. This way, the glans would experience friction to the lower side of the pubic bone, too. If you need to change the position to achieve this, go ahead and have a try. You might even continuously touch her G-spot with the glans, so you might even give your partner more pleasure.


In the end, relaxing about the intercourse is always good advice. You do not have to push yourself to anything. If it takes time, it is okay. If nothing of the above mentioned helps, you might want to visit a sex therapist or urologist to check for organic pathological problems.