my father passed away when i was young so i grew with pretty much only vague ideas about who he was. my mom had her own issues with him so she rarely talked about him and i rarely asked. had lunch with this guy that was his best friend and we talked about him for like 3 hours. he and i came to the realization that we are very very similiar. like everything from general personality, sense of humor, style of dress, business sense, relationships, recreational drug use, performance in school, intelligence, general attitude etc etc. his friend even pointed out that the mannerisms i used and the way i sat at a table were the same. its kinda creepy finding this out. my whole life i thought i was a totally original person.
what can explain this?