Only vaginoplasty done by gynecologist or plastic surgeons can make it tighter. But on the first place, the sexual pleasure is not dependent on vagina - it is clitoris which give maximum pleasure if stimula ted correctly during intercourse. You have to bend your thigh so as to lift up your feet in air so that the pressure is given on clitoris with each thrust. You can also try woman up position. besides this, there are a lot of psychological fact ors which are important for e.g. relation with your husband. if you have some hidden emotional problem with him you will not enjoy sex as much.