My Long Lost Son???

I don't have any blood relatives that I know of. I'm not sure if I have any kids, but maybe one of those girls from back in the day? I've thought it might be nice to find out I did have a son or daughter. 

Then again, maybe not. I can just imagine some old flame telling my unknown son my name and him tracking me down. There's a knock at my front door. I open it to find the guy in the picture saying "DAD!!!".  

Yuck! Best to leave well enough alone?