in a relationship bro... you're not going to be "fucking" your first time... if your relationship is with a decent girl youre going to be "making love" for awhile until you get to "fuck" her. Stick with up close and personal missionary, face to face... if you get lucky and she wants to switch it up, go maybe cowgirl. I would not hit it doggy the first time though. Keep it semi conservative/in her best interests.