Hello,
If your sexual organs are
too short it can be due to
testosterone deficiency, pituitary hormone deficiency, hypergonadotropic hypogonadism and growth hormone deficiency.Various investigations required are chromosomal studies,hormone studies like Gonadotropins (LH and FSH), Testosterone and DHT levels,thyroid hormone lvels,ultrasonography and testosterone therapy.
I would suggest you to consult a urologist and discuss this possibility with him
I hope that helps.Take care and regards.