Is there a connection between sexual intercourse and urinary tract infections?Dale Ann Dorsey: There is a connection between sexual intercourse and urinary tract infections. Sexual intercourse can cause some irritation to the urethra making it more susceptible for bacteria to go up into it and invade the bladder. Prevention for urinary tract infection is number one is to make sure that you are drinking lots of fluid and flushing out the bladder frequently, and also making sure that you use the rest room as soon as possible after you have sexual intercourse. And the reason I say this is because after you have sexual intercourse the bacteria can be up into the urethra and you want to flush it out as soon as possible so that it doesnt lead to a bladder infection.