I am on holiday in France, sunbathing naked at a deserted lake side. I am applying sun cream. I rub it all over and when I get to my belly I am conscious that I feel full because I have not had my bowels open for three days. I am always constipated on holiday and this is no exception. I take the opportunity to massage my belly vigorously in a clockwise direction, hopefully to encourage a bowel movement later in the day. I then apply cream to my bottom and I cannot resist massaging some on my perineum and anus. It is very pleasurable and gradually I push my finger into my bottom. My anus is tight but slowly it yields. Dreamily I start to masturbate anally, sliding my finger rhythmically in and out of my rectum. I am unaware that a man has arrived at the lakeside and installed himself a little way along the beach.
I continue to masturbate, using my other hand to rub my erect clitoris whilst I finger my anus. Suddenly I am aware of a shadow falling on me and I look over my shoulder. A man is standing above me holding an impressive erection in his hand, lazily masturbating. He tells me I need something bigger up by bottom, pointing his large hard penis directly at me. I protest that it is too big and I cannot take it. He tells me that I have to and instructs me to get on all fours. I am frightened but increasingly excited. He is muscular and obviously very strong. I feel submissive and that I have no choice, so I obey. He reaches for my tube of sun cream and positions the nozzle against my anus. My sphincter is very tight but he forces the nozzle into me. He squeezes a good amount of cream into my rectum and around my anus. I feel his fingers massaging my hole, concentrating on where it meets my perineum, where I am most sensitive. I am moaning aloud, feeling humiliated and ashamed of my excitement. I am also worried that he will be able to tell that I need a bowel movement. He reaches around me and his other hand finds my clitoris, swollen big with excitement. He comments that I have a big clitoris and starts to masturbate it between his finger and thumb, as he slides one and then two fingers into my bottom. I can feel him using his fingers to stretch my sphincter and open my anus.
After a while he withdraws his fingers and reaches again for the sun cream. Over my shoulder and very apprehensively I watch him lubricate his erect penis. Then he positions the glans against my anus. He puts his left arm around me to hold me steady and tells me to push out as if I am having a bowel movement. His words excite me further, especially as I am aware that I am constipated and of how long it is since I had my bowels open. He pushes his penis firmly and steadily against my reluctant bottom hole. I moan even more, but this time in pain - ooh, oh, ooh, it hurts, my bottom hurts. But he can feel that my clitoris is huge with excitement and I am panting. He continues the pressure and suddenly my sphincter gives way and he penetrates me. I cry out in pain. He tells me to relax and holds his penis very still in my rectum. He resumes masturbating my clitoris, very slowly and gently. Gradually the pain in my stretched anus and invaded bottom eases, and he begins to move his penis very slowly in and out. He is buggering me. He makes me say it out loud - you are buggering me, your penis is in my bottom, you are masturbating my clitoris, fuck my anus, bugger me hard, stick it up my bottom, oh my bottom, rub my clit, it hurts but I really need it, I need to take it up the bum.
I have to keep up a running commentary as he thrusts more vigorously into my bottom, and matches the rhythm as he rubs my turgid clitoris. We are both panting now and I know my orgasm is close. Suddenly he grunts loudly and I feel him ejaculate into my rectum. I can feel the warmth of his semen and he continues to masturbate me as I approach climax. I explode and I can feel my sphincter spasm around his subsiding erection. He withdraws and we roll over and lie side by side, both breathing heavily.
After a while, I feel the urge for a bowel movement. It realise that the massage, the cream and semen in my rectum and the stimulation of his penis has acted on my bowels. The urge to defecate is strong, I'm not sure I could hold it, and anyway I know how much I need to go - if I hold it back now, it will exacerbate my constipation and I may get impacted. I get up and walk to the trees that surround the lake. There I squat to defecate. My anus is sore but it feels open. I try to relax and let the BM come. I feel it slowly descending into my rectum and then I am moaning out loud as it eases out of me. It is very big and solid and I feel a mixture of pain and anal and rectal pleasure as I squeeze it out. It is very lengthy too and it seems a long time sliding out of my sensitised anus. Eventually I am done, and something makes me look over my shoulder. The man is standing over me, he has a clear view of my bottom, my buttock cheeks spread to reveal the crease between them and my anus, which he has recently invaded. He has seen me in my most private moment, having my bowels open and evacuated. His penis is erect again and he is masturbating furiously. He reaches out and takes my hand to lead me to the water. There he makes me kneel in the shallows so that he can wash my bottom. As he does so he continues to masturbate until he ejaculates into the lake.