What Causes Ovary Pain After Masturbation?

I am 28 ....ive never had full sexual intercourse, but i have had oral and have been masturbating since i was ablout 15....these days after masturbation i feel and ache in the ovaries area....it doesnt last too long....maybe 10minutes... but it hurts....any idea why this is.....it only happens when i masturbate though