I sucked another boys cock off aged about 17 when we shared a changing cubicle at a school swimming lesson. The experience of being naked together with another boy gut us both up rock hard erect. He dared me to suck his cock off and I did it to show I wasnt shy and to broaden my sex experience. He sat with his legs wide and cock sticking up and I knelt between his legs. He enjoyed it but I didn’t. I preferred it when he hand jobbed my own cock off.