I was 13 year old . His name was Diablito ,a pitbull mix .I used to play with him inside his dog house (it was a big dog house) it was always playful but sometimes he would get aggressive and try to mount me. I'd let him hump me because I thought it was funny at the time . I didn't know any better.lol. One day we went to the back to go play , we'd go into his dog house to wrestle it was always playful at first and then he'd start to get aggressive and mount me but this time I got a little curious and pulled my pants down to my knees. He started to hump me .I was excited at first then it turned to fear when I started to feel his penis poke my butthole and feel him squirting all over my cheeks so I tried to pull away but he's start to growl and pull me into him.I was able to get him off me for a few seconds as he started to lick himself . I slowly crawled away ,while he was occupied as I got to my knees to exit his house he hopped up so fast and mounted me again this time growling louder , grabbing me by my hips almost squeezing me and with one quick thrust he penetrates me , humping me hard and fast . I tried to pull him off but he bit the back of my neck .Scared not knowing what to do I let him hump me .He was humping me so hard and rough he pinned me down growling louder and louder with every thrust it was scary. I felt like I was getting raped by my dog .I couldn't do anything out of fear he would attack me. As he was humping me I started to feel him swelling up inside me.His penis throbbing inside of me .Next thing I know I couldn't get him out of me . His penis was locked into me for a few minutes. After a few more minutes he slowly swelled down his penis still throbbing in me.(I could feel him in me the whole time)I heard a little 'plop' when he pulled his penis out of me and started to feel all this warm goo oozing out of my butt and running down my inner thighs. I thought it was blood at first because of how hard and rough he was humping but noticed it was cloudy and clear; relieved that it wasn't blood .I pulled my pants up and left his dog house.I didn't know what just happened all I know is that It was scary and exciting at the same time .The scent is something I will always remember. After that I would let him mount and hump me every time we 'played' we were passionate lovers for 9 years after that until he passed. I LOVE YOU DIABLITO , I will never have a better lover then you my boy. I miss you so much.