ANSWER ME!!

hey every1 i rele i m curios bout my penis like its wat makes me a man and i m bout 6.5 inches is tht gud my girlfriend looks at it and say tht is rele big but i m only sixteen and she 15 so i dont kno maybe she doesnt kno a lot bout penis, so wats the rele average size and how can u rele get a big penis and wen i masterbate in alternative days i penis shows tht i have a 7 inches but i still think tht is small so i want kno is tht big for a 16 or small or is it average and taking tht wen male masterbate they get sperm out and tht is realize of hormons so does tht mean the more i wank the more muscle i get taking tht i eat properly and how can i get a six pack easly within a short period of time can som1 plz answer all my question and tell me wat i should do
oh my girlfriend also says i m rle fat as in my penis size and i m only 55Kg so doesnt tht mean wieght has notting to do with penis ?i will be waiting for a lot of relpies and thank if u answer or read my questions :-)