i recently had an encounter with a woman in which we did not have condoms. my better judgement told me not to go through with it. however, i did insert my penis into her vagina for approximately 5-10 seconds, no more. i realized what i was doing and pulled out. i did this twice, the second time no more than 3-5 seconds. so what are the odds of contracting an STD from intercourse lasting no more than 5-10 seconds? anyone have a general idea?