Over several months of Internet dialogue during which a young lady repeated her desire to give me buttock injections as painfully and humiliatingly as possible, it is finally time for us to meet in person. I go to her knowing that she will use cold sterile water and fearfully, albeit excitedly, wondering how much those shots will hurt.

On my arrival, she tells me to take off everything except my (under) pants. She stands behind me as I comply, then pulls down my pants and gives me two quick stings low in each buttock. Relieved that they didn't hurt nearly as much as feared, I reach to pull up my pants but she tells me to leave them down with the explanation, "Those were just a few booster to prevent you sitting down later - now come the really painful ones for which you will have to be held down." I turn around to see that another girl has entered the room and stares at my frontal nude.

The girl sits down as I watch my friend remove the dread sterile water from the fridge and she tells me to bend over. The smiling girl obligingly hitches up her mini-skirt to give me a pleasant view and I apprehensively stretch my nakedness across her supple bare thighs. My humiliation is achieved with the girl seeing me naked and the prospect of her watching me injected in my vulnerable bare bottom - especially as she seems to be enjoying things. All that remains is the posterior pain, which I fearfully expect to be intense.

The girl sensuously strokes my bottom and I reciprocate by fondling her leg. She asks if I am scared and I admit that I am, to which she comments, "Just hold onto me and I will hold you." Holding on to her thigh is a pleasure and I allow my hand to creep up her skirt, which she doesn't seem to mind. Then I feel the alcohol swab. She tells me to brace myself and I tense for the shot. At first it doesn't hurt too much and I say so but the girl laughs saying, "That was just the needle gong in. She hasn't injected anything yet." A moment later I feel the intense burn permeating my entire buttock as the cold sterile water is painfully injected. It hurts so much I don't even feel the needle come out before my friend swabs my other cheek. The girl tells me to brace myself and I react by strongly squeezing her buttock as she holds me firmly in place. Then I feel the excruciating shot, after which I try to stand up but my friend tells the girl to continue holding me because, "We haven't finished yet." I protest that my entire bottom is so sore I don't think I could tolerate any more but to no avail as I feel another swab on the same cheek. Once again I squeeze the girl's buttock for an even more painful injection in the already tender site. It is almost unbearable but I am helpless to do anything about it. Before I realise what is happening, my friend swabs and jabs the other cheek without warning, causing me to shout with shocked surprise and making both women laugh.

Having succeeded in her desire to make me scream with pain, my friend leaves things at that and I stand up unabashedly to rub gingerly my extremely sore bare bottom with pants still down. I notice the girl also rubbing her bottom where I had squeezed her and apologise for having hurt her back there. Her reply, "It's ok but just as well I no longer get shots back there. I used to get them like that when younger but now get injections in my arms," completes my humiliation.