How do i convince my parents to let me get my ears pierced?

ok so i have been asking my parents if i could get both of my ears pierced but they always say no. they say that they dont like it and they think boys with earrings look stupid. i tell them that its my body and my life and i could get earings if i want to cuz its me not them. they just say they dont like it and they wont let me get my ears pierced. i want to get dimond studs really bad but my parents wont let me so can somebody plz tell me a good way to convince my parents to let me get my ears pierced?