Lately I have been worried that my girlfriend isn't satisfied by my penis size. We are 20 years old, and have been going out for a little over 2 years. For both of us, this is our first sexual relationship, so we are both inexperienced in that regard. Lately I have become insecure about my penis size and its ability to pleasure her. I am 6" in length, and 5.25 in girth. There are a few reasons I feel like this is not enough for her. The first time we had sex, she did not bleed. This made me feel like my penis was/is not long enough for her vagina (it did bleed a few weeks later from me fingering her). Another reason I feel like she is not satisfied is because recently, as she was putting a condom on me she commented "maybe we need to start getting magnums for you" in a somewhat excited voice (trojan regulars are generally pretty tight on me and at my hardest they are uncomfortable, but not to the point where i would need magnums). This made me feel like she WISHES her boyfriend needed magnums. Finally, when I penetrate her, after the first couple of strokes I feel as if I am not thick enough for her, like there is barely enough friction for her to feel me. However, I have nothing to compare this feeling to because she is the only sexual partner I have had. She has never commented on the size of my penis directly. I would really appreciate any feedback/comments, I guess I am just looking for someone who has more experience than I do to comment. Also, should I bring up these questions about penis size to her in any way? or is that just asking for disappointment? I am worried that if I bring the subject up, it will maybe boost her curiosity, or be a huge turnoff for her? thanks in advance for any help.