It's a lot more than that. The intestinal wall is only one cell in thickness compared to the several cell layers existing for a female's placenta. The unnatural act of forcing objects into the rectum will easily damage it causing many deleterious issues to occur. Fecal matter escaping into the body cavity is life threatening, but bleeding presents even more complications.

Besides the obvious pathway for disease to be transmitted from fecal matter mixing with blood. Sperm entering the blood stream is another matter that is not ever reported. There is far more to this and involves what is called 'microchimerism'. The science on this subject is greatly censored. But, certain published studies provide insight to the censored topics.

In 2019 science was astounded to discover females are tainted by past DNA leaking across the placenta barrier (Fetal microchimerism) and past sperm DNA snippets. Far more shocking was thousands of 'mystery' RNA strands were found in male primate sperm. In one case after a bone marrow transplant, a man with leukemia found that his donor’s DNA traveled to unexpected parts of his body. Three months after his bone marrow transplant, Chris Long of Reno, Nev., learned that the DNA in his blood had changed. It had all been replaced by the DNA of his donor, a German man he had exchanged just a handful of messages with. The DNA traveled through recipients body and overwrote his own reproductive DNA.

Basically, DNA/sperm can survive outside of the womb and if it gets into the bloodstream it travels though out the body and can survive for decades depending on its end destination. For example, a study found the DNA of their partners in the brains of women who were nulligravid (never pregnant) some 38 years later. There is no white blood cell protection in brain or spine ever to patrol brain invaders. Women may carry the DNA of all their Sexual partners. It could alter the way the mind works, similar to how many animal life forms can alter the frontal lobes of mammal brains, but typically these are things like Toxoplasma gondii, and Ophiocordyceps unilateralis, and both get across blood-brain barrier via total invasion, not surreptitious snippets of free floating proteins. However, one study indicates the DNA from sperm of ex-partners lingers In female flies and influences the genetics Of her offspring .

Studies show sperm lives only 8 days in a primate, but the haploid sperm DNA, which is not technically living, and is bioactive for thousands of years, and the RNA mystery large payload in every sperm cell, are thought to modify female bodies by altering and flipping proteins sitting on DNA strands, called "histone bodies" which allow the now shocking and newly discovered 'Epigenetic Data Inheritance'. This means animal life forms store and pass inherited traits not coded in DNA, and can pass it four generations forth while. Females with no sons and, in fact, no embryos of any kind ever, have DNA in their bodies and brains from men's sperm alone. I premise that homosexuals are also very susceptible to these circumstances involving microchimerism. It could be argued that microchimerism could be a reason for homosexuality.