Hope u forgive my bad english but I try my best to talk about my experiences^^
It is everything true =)
I was 12 back then in sommer holiday in Bavarian(Germany) with my family.
Back then I met my first love, if u can talk about love in that age
She was 10 years old and her name was eileen. Dont be schocked cause even she was very young, she knew everything about sex from her older sister( I think she was 14 or 15), she also explained me in funny small talk about sex what a blowjob is*lol*.
Well everything started on the first day as we arrived there. Our place was a nice sanitarium/spa for mothers and children. It was a big hotel with pool and many rooms for adults and children to hang around, chat or play games. The area around the hotel with some hayfields and a forest also belonged to the hotelarea, it was a very nice and big place where every child enjoyed playing in and outdoors very much =)
Just after 3,4 hours when we arrived me and my bro started playing soccer. As soon as other childrne saw that, they joined us , beginning with my little lovely girl(her name way eileen). At first I thought she was a guy*laughing* cause she wear a cap which hide her cute face pretty well, our voice in that age seemd were anyway sounding high on boy and girl and just the fact that she played soccer with us made me believe she was male. So after some fun kicking we made a break and had some small talk where I realised she was actually a girl...and well that was some kind of fascinating for me, a (really realy)cute girl (after I had the chance to look in her face)who played soccer and was very strong (she made some fouls while playing soccer wehre I felt her strength
) and had a comparative big knowledge about love stuff and also sex (i just started to be in puberty^^) and seemed also to like me 
Although there were a lot of other kind children( maybe about 20) we were always hanging around played and talked together...And after my desire grew to be with her, I realised i fell in love with her...I wanted to take her so badly in my arms and kiss her <.< So I tried to strenghten the bound between us and make body contact in some way, and as usually kids do it in that time, I started to tease her so she was shaking or hitting me but always without serious in a friendly funny way^^
Sooo everything normal up until now...after the first two weeks from our 3 weeks-holiday we were the first time alone in the swimming pool,without other kids or any adults (hrhr) and i was teasing her again in the water =) Well as i said she did know a lot about sex and also some f acts about the male anatomy...so after my teasing she swam to me, hold me tight on my shoulds an kneed me right into my balls xD
At once i lost my strength and sank slowly into the water... i just saw the suprised look in her face, I think she could imagine that this kind of hit would hurt ,but not that much bad before my head was comepletely under water, she took me in her arms hold me thight and looked over me that i didn't drown!
And well..there i was..in the arms of my first love...very thight on her body...I dont have to say for me, I was in heaven! even with the pain between my legs
But that wasnt all, as It said before she also liked me very much, and when I started to get my strenght back and tried to get back my balance, that little beast kneed me again, but didnt hit so badly that my balls were again crushed against my pelvis...I realised that she wanted somehow to anesthetize me that I couldn't escape of her soft hugging, so i just let go and stayed in her arms... and also I started to like her touches with her leg in that area
Because she never kneed me again with full strength...just to show me "stay calm, be quiet and dont fucking struggle!^^" it made me everytime aroused(but didnt get a boner)
So we repeated this game very very often and both enjoyed having us into each others arms. I liked the contact with her body between my legs and she made the impression that she loved having the control over me...a boy who should be stronger than her
Sadly noone of us tried in that last week to kiss each other =( but we repeated our game every day...starting with me teasing her, then getting kicked,kneed or punched in my balls byher, and let me take in her arms afterwards... being under control of my little cute dominant love .... I will never ever forget you!
And that is , how my ballbusting fetish began and my fantasies started ;D
I hope u could understand my english and that my story wasnt to boring for you. The fact that it dont contain sexual activities make me think it isn't the right story for the e-archieve but maybe ok for this board ^^