People feel pain differently

I have long believed that pain sensitivity varies genetically among people. In a recent medical research, a gene called GCH1 regulates an enzyme that correlates with pain sensitivity in rats. In humans, having 1 copy of a particular version of the gene makes you less pain-sensitive than other people; having 2 copies makes you highly insensitive to pain.

I am sure I get just 1 copy (or less) of GCH1, and my daughter have 2 (or 3) copies. Next time when you admire someone who seem more heroic than you, please understand that they may just be luckier and more comfortable under pain.