My penis is very small and my age is 30 yr.penis had done normal function but the problem is penis size is small size aprox 2 inch.after erectile it become 3 to 3.5 inch.and skin is cover till end point.when a saw the sex movie i feel that i am not that much erotic and and sperm count is also a problem .so plz suggest me wht can i do .is this a curable or not . actually my going for the marriage this yr.plz help me .