For the most part, this idea stemmed from a Facebook debate about why certain kinds of sexual favors are not favorable. The person told me that the stomach acid would kill anything that would pass through, and I eventually found out that some sugars, which semen contains, can pass directly to the bloodstream through the pores in the mouth, although some sugars in semen may not actually pass through. Then, I found an article (https://www.sciencenews.org/article/male-dna-found-female-brains) that stated that male DNA (mainly from male fetuses) have been found in the female brain. Honestly, I cannot find a direct scientific connection, but I think there is enough of a dotted line to the conclusion that further research would not be illogical, even if the conclusion is unfounded. However, after the debate, I realized that I had many friends who seemed to change dramatically after such actions. Of course, many rationalities exist for this, but I thought this might be one of them.