my husband has never mad me cum

threw oral or penetration. I thought it was normal I didn't know us women are supposed to cum also until recently my friends were talking about cumming during sex. is somthing wrong with me? I'm 27 been married 9yrs and I've always thought we fuck until our husbands nut then we're done. I can make myself orgasm by rubbing myself but I've never done it while me and my husband have sex. only when I'm alone once in awhile.