First of all, I think it's good that you're being honest here and it shows that her feelings and experiences are important to you. I'll just comment on a few things here from my own perspective...
Quote from: anibioman on January 21, 2014, 04:44:07 AMSo I'm straight and I have a great girlfriend. I do have this one issue, we are both sexually inexperienced. We are slowly moving forward in regards to sexual stuff. We are very comfortable with one another, as comfortable as two awkward teens could be with one another.
Probably an important thing to mention, although I'm sure you obviously are aware of this already, is not to rush things. Sex shouldn't be something that is anticipated as "the next step forward" really - unfortunately, in today's time, teens especially seem to have this idea that sex is expected and that everyone is and should be doing it at some point. You shouldn't feel that way, because even though it may seem "outdated", a lot of couples are choosing to remain abstinent until many years into their relationships.
You don't have to remain abstinent either, but I suppose what I'm saying is that you shouldn't be worrying too much about this - you're anticipating things, which is normal, but let it happen naturally. If you micromanage every aspect of it, the experience will be more about anxiety than enjoyment - and that can completely put you off sex.
Quote from: anibioman on January 21, 2014, 04:44:07 AMWhen I think about us having sex for the first time, I feel bad. like her first time might be diminished by the fact that my dick wont be real. As we are both virgins I don't even know if my synthetic wiener would make a difference.
I was quite the opposite. My wife had sex before she met me (she's straight and it was with her highschool boyfriend). I think that I would have preferred for her to have never been with a cisguy before me and have experienced what the "real thing" felt like because that severely crippled my ability to be confident with her in the bedroom. It made my dysphoria worse because I was always wondering if she was disappointed in my "plastic cock" because it wasn't anything like a real dick.
To be honest, the last sentence you wrote in the above phrase is key here - she won't know the difference. Besides, I think that ultimately if the relationship is real and solid, it's the experience of being with YOU that she will absorb - not whether or not the dick was cold and rubbery versus warm and silky.
Quote from: anibioman on January 21, 2014, 04:44:07 AMI wish one of us had sex before. If she had then I wouldn't feel this pressure, and if I had I would at least know what I'm getting into.
I think that you're missing the benefits of your situation. She has nothing to compare you to. You surely have seen porn before? I know that it's typically unrealistic, but take pointers from various things you see and from talking to others about sex. Remember that you only have yourself to live up to - you would be her first, so you only want to make it a special experience for her - stop focusing so much on your dick and focus more on all the ways you can make her feel good.
Quote from: anibioman on January 21, 2014, 04:44:07 AMAlso i have no idea about Dick selection, I don't want to spend a ton of money if its not what we want, but I want it to feel real, and it being silicone is important. I know my skin is very sensitive to various materials.
Honestly, I hate silicone as it feels super unrealistic to me. I prefer cyberskin with a condom as the texture is much more lifelike IMHO. But if you are really worried, just use a condom over a silicone cock. You won't have to worry so much about getting a fancy one if you're just going to wrap it anyways. A condom-covered dick is going to feel about the same all around unless it's the real thing or (possibly) a prosthetic like a ReelMagik.
Quote from: anibioman on January 21, 2014, 04:44:07 AMShould I talk to her about this concern? Do you guys have any advice?
Yes, you should. Be open and honest with her about your insecurities. A) she will appreciate that you are thinking of her experience and B) she may be able to offer you supportive words and comfort you.
Really, don't put so much stock into a dick. There is so much more to sex than just a cock - after all you have a tongue, fingers and skin.