Dprince- you're asking a lot of good questions about sex, and seem like you genuinely want to eductate yourself about what's going on. GOOD FOR YOU! Might I suggest this website:
http://www.sxetc.org/ - it's a sex ed site geared towards teenagers and it has tons of info that you and your GF will probably appreciate very much. If you would like sex to be all it can be (and who doesn't) the MOST IMPORTANT thing you can do (for yourself and current/future lovers) is BE EDUCATED!! And make sure your sex ed is coming from people who know what they're talking about. Ask questions, get answers, be aware, be safe, have fun!
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Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi