This happened in my office. I received some erotic videos as message in my mobile and pre-cum came after seeing that. Immediately after that I went to the bathroom to defecate. My practice is to remove my cloths and defecate, then put my cloths on. After defecate, i could sense that i landed in a semen. Further to that i weared my underwear and started watching the erotic videos again, pre cum came again. Doubt is if the pre-cum is in contact with the semen (suppose if it infected), if the semen is clinging to my underwear, will it pose a threat, as both are bodily fluids in contact?