the most common pathogens that cause a uti in women are from the colon (enteric organisms). those "butt germs" simply migrate north take up residence in the vaginal area which is close proximity to the urethra (urinary opening). even if you are a clean person and careful during sex your vagina and urethra have some dirty neighbors. no matter how careful you are sex can stir up germs in this area. the mouth has plenty of germs as well so yes the female receipient of oral sex could contribute to a uti as well.
can oral sex cause a uti? . i always get a uti and its weird to me because im a very clean person when it comes down to intercourse.