in a alternate universe to Halo, Humanity was exterminated yet the Covenant still eventualy colapsed due to infighting, you are from a synthetick race called "Human Replica Genome 2" or "thick Sangheili" after the gass procesing is administered, after the Covenant the Sangheili lost a lot of its specie, residing to use some remaining human genome to create the "Human Replicka Genome 2" which if administered some Sangheilian gass while in puberty or if teased eith Sangheili bodies would turn, break and remold into Super thick Sanghelie with giant boobs, big ass and a breedable personality, perfect mates known as "Thick Sangheili". "Human Replica Genome 2" is all male synthetick specie, it apears human ages 0 to 16 and can already develop a dirty mind from the age of 5. The Sangheili population stabilized to normal 10 years ago but using "Human Replica Genome 2" basickly became a part of Sangheili culture by then