@gamehawk ah...the problem with the high school biology blood test experiment.
@gamehawk It was actually a test to determine blood type, and in a rare while someone would discover that their father couldn't have been their biological parent.
Needless to say schools started to be more cautious about the experiment.
@alienghic Yep, I did the test back when I was in high school, and in fact our teacher *told* us that discovery was sometimes made, and that we didn't have to do the test if we were concerned about it (or if we just didn't want to bleed). I took it, got an A+.
@alienghic Only more so, yep.
(Son didn't do that in his biology class; guess bloodborne disease has made that a thing of the past.)