Im 50 and when i have intercourse it hurts, why and what can i do to enjoy it again?

Possibly: Fisrt of all, have you went through menopause or have you had your ovaries removed for any reason? A likely cause is pain with intercourse, or dysparunia, is lack of moisture and vaginal atrophy, which occur when your body stops making the same amount of hormones it used to. You can try an over the counter water based lubricant, such as astroglide. If no help, then see your gyn.