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Case Title:  He experienced sex with his dog's hot vagina/cervix/uterus (3 or 4 degrees higher than his penis) and the tie by the vaginal/cervical/uterine cramping/gripping/sucking against his penis for his sexual orgasm twice.
Reader: 9/07/2005>
Hi dr.Lin.Today I attemptet having sex with my female dog.First, she was very acceptive and after having "lubricated" her with my lips I tried to put my penis into her semi-erected almost like male dogs do and I did it.Then, once I was into her, I felt a horrible heat and her vaginal muscles pressing my penis.I was really feeling very ecstatic and I was pressing my penis to go deeper and deeper until my penis touched a genital organ of hers.Then I tried to pull my penis out but she wouldn' t let me and staring at me , she barked once.I understood and with all that pressure from her vaginal muscles I was"forced" to ejaculate into her.Then, as both were less erected I wanted to pull my penis out, but still she wanted more.So all the proceidure above happened again and I ejaculated into her once more.1)Was all this situation that took place into her vagina normal? 2)Do you think I hurt her when I touched "something" into her? 3)Was she supposed not to let me out without ejaculating?And with that behavour? 4)Do you think I left her pregnant by ejaculating twice inside her? 

Dr. Lin: 9/07/2005>1)Was all this situation that took place into her vagina normal?
The dog body temperature is about 3-4 degrees higher than the human body's, as described in
The vaginal/uterine/cervical heat can boost the penile erection and expansion for the dog tie ( http://www.actionlove.com/extra/animal.htm  ).
Her vagina/cervix/uterus will produce a sequence of cramping contraction.
It is likely you penetrated into her uterus to induce the cramping//gripping/sucking contraction.

2)Do you think I hurt her when I touched "something" into her?

3)Was she supposed not to let me out without ejaculating?And with that behavour?
It was a cramping of her cervix. It is called "the tie" in this link -

4)Do you think I left her pregnant by ejaculating twice inside her?

Reader: 9/08/2005>Hi dr. Lin! I guess you were right.Now that you gave me more information i repeated having sex with my female dog.This time i decided to be her "male dog" master.So, i did it her way completely.First, i aproached from behind and licked her very well.She tasted awsome.Then, i mounted her with my penis semi-erected again.As i was accomodating myself into her vagina, my penis was getting bigger and bigger.So, i started to thrust her more and more.Her vaginal muscles were pressing me so hard that i was feeling extreme orgasms.Plus she was producing some liquids that were driving nuts the head of my penis.As i was thrusting i touched her uterus again and this time i didn' t "run" away.I was touching it a lot of times which made the dog moan.Was it of orgasm?Can bitches feel orgasm?Anyway, i finally ejaculated into her and this time i felt i ejaculated twice or more as i do when i have sex with women.Could this be possible?Then, i stayed tied with her for30 minutes which made me have more orgasms and i even ejaculated just by being into her vagina and without moves!Can a bitch do that to people or males in general?

Dr. Lin: 9/08/2005>
Her high temperature vagina induces more prostaglandin E-1 and E-2 synthesis in your glans penis tissue for a hard erection. Prostaglandin E-2 is an inflammation hormone for expanding the tissue, while prostaglandin E-1 is the elasticity and healing (housekeeping) hormones to allow the tissue and nerves to stretch and expand without being damaging. When both effects are equally combined, your penis can be ballooned to an extreme size without damaging the tissue and nerve.  That is why when the female dog is in Heat, her vulva is swelling.  The same situation is also applied to women and men.
The animal cervix orifice is very big and wide open for the penis to penetrate into her uterus.
since the female urethra opens widely into the vagina with no bottleneck, the male penis must ejaculate inside the uterus so that the semen/sperms can stay inside the uterus. Once the other hand, the direct stimulation of the uterus will induce the uterus and cervix to cramp and suck up the penis in an attempt to force the male to ejaculate. I don't think the uterine cramping contraction is an orgasm, but it will let the female dog to moan. 
It seems the high-temperature dog vagina and secretion (with a lot of prostaglandin E-1 and E-2) can stimulate your prostate and seminal vesicles can produce more ejaculation fluids for your ejaculation again and again too. Both prostaglandins can help you retain your erection after ejaculation with a very short refraction time. Actually, I have addressed this in this link -
On the effect of the vaginal/cervical secretion on penile erection/ballooning and premature ejaculation. Why one tight vagina makes him erect harder and last longer for sexual orgasm , but the other tight one promotes his premature ejaculation?
==> http://www.actionlove.com/cases/case11032.htm  
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