sniff sniff.. do I smell BULLSHIT?!
1. Biologically and technically bullshit. The G-spot is only 4-5 cm in the vagina, if you're penis is longer than that you can give her good sex. In terms of sex penis size means less than 20% imo. Other stuff that's more important, dominance, emotion, creativity. Google or torrent "sex god method".
2. Emotionally bullshit. Girls don't give a fuck about penis size regardless of what they say, they do give a fuck about feeling good emotionally, and penis size does add to that. There are so many other things that do too though.
pick up her, spin her around, leave your bedroom door slightly open and slam her into it (softly) so it makes a noise as it shuts, tease her. I know this is hard when you're a virgin, but you'll find your own style, don't take this word for word either.
Conclusion, just be comfortable with who you are and share yourself with her genuinely. Some girls won't like you, but some girls definately will. Girl's tastes in guys are as varied as their tastes in food. To those who don't I say fuck them, they don't know what there missing out on. Build relationships with girls or people in general who like you and respect you for who you are, trust me no matter how quirky you are, if u express yourself genuinely there are girls who will like you.
and yes there are girls who like geeky guys with small dicks (no i am not trolling I kind of fall in this category). I've had chick friends who say aww my x-bf's dick was so huge that it hurt, and i am so much more statisfied with a guy with a smaller one.
check out attractioninstitute.org, run by a guy on wickedfire and a mate of mine