Aaron had purchased a sexual drug of the black market. It contained altered estrogen cells, which attached to his testosterone, allowing increasing your orgasm by releasing cum together with male essence. The result was a more intense orgasm. Aaron took a sip and splattered all the way up the wall after a first orgasm. He was hooked.
Hours later he couldn’t stop. The last drops of manliness were exiting his body, as almost all of his body was now emptied of testosterone, resulting in a fully feminine body, only leaving his penis for some more orgasms.