There is HOAX story trending on the internet stating "Woman Says She's Pregnant By Black Man From Toilet Paper Contaminated with Semen." The story comes from a known satire and hoax site but some people only read the title and unknowingly share the HOAX.
A little of the NOT TRUE story:
An Alabama woman claims she became pregnant with an "unknown man's" baby after using a 'porta potty' at the county fair. Britney Thomas, 18, explains the peculiar event: "I used the porta potty at the fair last year after someone else was using it. I found some semen left behind on the floor by the previous user. The toilet paper roll was placed on the ground too. I believe that when I was using the toilet paper to wipe myself off it was contaminated by the semen on the ground. Now, I just gave birth to a healthy baby boy with dark skin.
Though not 100% impossible, the probability of being inseminated in this manner is highly unlikely. Sperm has about a 20 minute life expectancy outside the body. The sketch image used in the NOT TRUE story is actually of a "suspect in the 2015 shooting death of an Oregon man." As for the image of the porta potties, it comes from this 2012 article titled "" and has been used in many stories since.