A guy who failed a paternity test after his child was conceived through a fertility clinic using his sperm is not suing. Reason? Seems the child is not genetically his but his brothers. No loons, there was no hanky panky going on. The so called “brother” was an unborn twin. Yep, the guy absorbed the dead twins genes in the womb. In other words his dead twin is actually the father. Creepy as. The phenomenon is known as human chimera. Still confused? So the man’s sperm was found to be a 10 percent match to the infant, while the genes in his saliva were not a match.