Kneed I the balls at a pet expo

So, I usually hangout in public places most of the time, I was in a pet expo or a pet meet in London, and there came lots of people with their pets, I went to hangout over there and meet some animals.

There, I met a girl named Tara, she was a beautiful tanned American girl, wearing a mini skirt, a full sleeve shirt, and a cap with sneakers. I flirted with her a bit and in a playful manner she hit me in the balls with her Backhand, and I just liked it.

I told Tara with hesitation that "Um, I kinda liked it", Tara asked "isn't that supposed to hurt?'', I replied "yeah, but I like that pain", Tara asked me "shall I do it again?", I replied "okay, but can you do it with the knee?". Tara said "sure!" And came really close to me and without touching my shoulders, she rose her knee to the height of my balls.

Hot white pain went through my balls, as her knee made contact with my balls, she held her knee for 2 seconds atleast and I felt like my cum is gonna shoot any moment now. Tara felt awesome as it was her first time kneeing a guy in the balls, we talked a bit more, exchanged number and went to our roads.