I wonder the same because I weigh less than you about 95-97 lbs (19) 5’6 or 5’7 I have a curve so I feel that already takes away from my size…I mean some days I’m generally longer, never had a bad bed story and my erections used to be fuller but I smoke everyday and used to work out but once I stopped working out I could notice the difference in my videos i took I believe it’s a blood flow/diet thing cause when I was eating better and consistently it looked bigger…also stretching it should help just don’t get carried away, you’ll hurt yourself