Sitting on a boy’s hot stool will not lead to pregnancy. Pregnancy is not as simple as people think, it is a very complicated process that requires a man and a woman to have sexual intercourse in which the man’s penis enters the woman’s vagina and there is a flow of semen into the vagina, leading to a successful combination of sperm and egg in the fallopian tube to form a fertilized egg, which is then successfully implanted in the woman’s uterine cavity before pregnancy can occur. So, just sitting on the hot stool of a guy is not likely to result in the combination of sperm and egg, and there is no possibility of pregnancy.