Does he seem to mind that your holding out on him?
does he masturbate??? if so, tell him to leave his penis alone for a month to see if his sexual excitement for you becomes stronger
does he have a penile venous leak??? if so, a doctor can determine that and presribe some viagra, cialis, levitra for him to help maintain his erection
do you think he's cheating on you with another woman??? experiencing sex with another outside of marriage can bring guilt or non-satisfaction and this can cause an erection to go down everytime.
or is he just nervous that he thinks he's going to lose his erection everytime yall have sex??? maybe a nice drink will calm his nerves down.
Is there anything else going on in your life right now? Stress at work or problems of any kind? Try talking to him. It's not always easy, but it can help. It may be performance anxiety, stress, or he may need to go to the doctor and have some things checked out. Best of luck
Ur life partner is given by the heavnly god, god will not make any mistake. U must love him very much, not even give any word hurt or any look hurt it will make real problems. Love him more than you can give ask him to touch you and touch his penis and ball softly every time at the time when u want to have intercourse, make him realize that u are not having any problem with him. Dont ask or force anything from him. Live a happy life. Wish u a happy married life.