Well, it a story.
So here i was with my great dane girl, in the most secluded part of the yard. It was a beautiful night and we were both in the mood, though up until that moment i had only fingered her clit and had taken her to a orgasm several times that way. But that night i decided to go a little bit further and i penetrated her with my finger, the little hymen that was there broke without fanfare. At this point she was lying on the ground (our favorite spot) and i was sitting right beside her, then, when i decided i would finally do the full thing with her, i layed behind her in sort of sideways doggystyle, i started caresing her as i made my way down her with my other hand, and then, when i reached her pussy, i grabed my dick, i guided my self in, and it felt magical having my cock embraced by her wet, warm and soft vagina, after some time of this weird doggy style i she shifted and i got on top of her, up until here i hadn't gone all the way in, but when we shifted to facing eachother i went my full length inside her and started going a little bit harder, it was almost the best sex of my life. But i was young so it didn't last long.
and as a side note, i didn't have a lot of pubic hair yet so it was quite noise ramming her in missionary, i wonder how i never got discovered.