Getting my friend’s dog to pop our cherries hot Sex Stories – Y2-Stories

Hi I am new here, don’t judge me please but 16 years old and looking for advice.
I am a virgin so I have not had much luck but that does not mean I am not horny, I am very much so. We have been watching a lot of porn while masturbating and came across dogsex accidentally and I was hooked and it has made me have very nice orgasms but I still really want to have real sex and I do not mind it being with a dog for my first partner. Well I may finally have my chance. My friend Stacy’s parents asked me to dogsit this week coming up for this weekend while they are on vacation. They have a nice big German Shepard and he has a full set of balls and everything seems to work because I caught him humping Stacy’s leg and she had to keep pushing him off . But we have decided that we want him to take our virginity’s but we are scared and although we have watched a bunch of vids we are not sure what to do. I know I want us to do oral on each other and I hope to give him a handjob but what I really want is for him to fuck and if all goes well to tie us with his knot. But we are scared and want to know will it hurt, how much will he cum, how long does a knot last, how many times can he have sex in one day? Should I bring lubricant? Reading the experiences here of people really turn me on but I hope someone here can offer advice for us. I know we can’t get pregnant but beyond that I have no idea what will happen but since we will have a full weekend together, we want it to go well. I never thought about socks but have seen some girls wear them in the videos I watch but makes sense to keep him from scratching. What we are trying to find out more about is his knot and what to expect. How big will it be and how bad will it hurt? How long will he knot me and Stacy and how much cum will he have. Obviously I know he can not get me pregnant, but is there a such thing as too much of his sperm inside me or if I swallow it can there be too much in my stomach? Do you think we should try putting peanut butter on our pussies or will he just start licking?