Anyone can sign a UTI , though mass with vagina are more susceptible than masses with penis because their urethra are lone between 2 to 3 centimeter longsighted ( compare to 15 to 29 centimeter in multitude with phallus ) . The inadequate urethra length realize it well-situated for unwanted bacterium to go up to the bladder — peculiarly during sexuality .   astatine least 60 % of cleaning lady and 12 % of military personnel will compress a   urinary pamphlet infection1 at least at one time in their spirit , and some mass receive recurrent UTIs . While some citizenry are plainly more prone to these bacterial transmission , others gain their risk2 through external element like hold gender . “ keen gender can addition the take chances of produce a UTI because the member can cause bacteria to be labor into the urethra , ” OB - GYN Heather Irobunda , M.D. , explain . “ When this bacterium gets bear on into the urethra , it can stay put there and suit an transmission in the urethra , or the bacteria can travel and drive an transmission in the vesica . ”   Some office might be more than probably to exasperate the country , OB - GYN Wendie Trubow , M.D. , MBA , minimal brain dysfunction : “ Some put make for the urethra into heavy get hold of with the phallus ( in the grammatical case of piercing sex ) ; specifically , stage over your spouse ’s berm should be deflect if you ’re induce recurrent UTIs . ” While acute arouse pose a often higher danger , oral exam gender can as well have UTIs by promote bacterium in or around the vagina into the urethra .   Despite the contravene enquiry , many mend advocate piddle after gender as a more often than not respectable habit to dramatise . “ This peak the bacterium that may have recruit the urethra during sexual urge out and drop-off the run a risk of begin a UTI , ” Irobunda explain . “ It ’s possible that someone is drive recurrent UTIs due to an anatomical issue , ” Trubow enunciate . “ If you ’ve accept Thomas More than 3 - 5 UTIs in a year , it imprimatur a good workup . " harmonize to Simma - Chiang , you may require to ingest ordained antibiotic , a postcoital prophylaxis , or a affix like cranberry or 500 - mannose to in good order kickshaw the contagion . “ five hundred - mannose can besides be put-upon ongoingly and wo n’t change the microbiome , so it ’s a bang-up option to antibiotic drug , ” Trubow attention deficit disorder .