Seriously, in my teenage years, neither my friends nor I ever thought about how big a guy's "package" was. If one of my friends was considering going out with someone they never thought about his size--it was more based on how cute he was and what he had done in class that day. Actually, I have never even heard of a girl talk about her partner's size even if we are talking about sex.
I'm not a guy so I can't vouch for this but I feel like the issue of size is talked/worried about more between guys because they have the misconceived notion from movies and media that girls obsess over their size.
This reminds me of the time where a girl told me a guys d**k is 2x his shoe size minus 4 inches, thus making my d**k 22 inches.
Then she asked is your d**k really that big, and blushed. neutral
Even if that was true, the ******** are you blushing for you could even handle 8-9 inches.
I'm not a teen anymore, but the only time I've really ever thought about guys' size is when it was brought up in conversation - usually by guys. Didn't care to think about it otherwise, and I've never been under an impression like that.