Hi How Are U Dear Doctos Today I Read Somewhere

hi how are u dear doctos today
I read somewhere that anal sex between couples (monogamous hetrosexual )and married people (so only have sex with only each other) and the man cumming inside the anal cavity can cause anti sperm antibodies. I dont believe that it can. Anyway, please answer my question as soon as possible. Beside , can couples who take a shower and cleaning each other bodies and anal area and inside by medical ways get STDs or cleaning is enough? . lastly, after cleaning is it to practice oral to anal or that will cause transmition or oral fecal bacteria...?

Thank u and any beneficial advise on the matter is welcomed ...