Nasty experiences change your DNA.
I had heard that it`s not just intelligence levels and physical and personality traits that can be inherited but that trauma can somehow be passed on via genes. It`s relevant to arguements and discussions we have on SL IMHO!
So I looked for and found an article about it. It`s called epigenetics ......
https://www.bbc.co.uk/future/article/20190326-what-is-epigenetics