On some forums i found interesting read that social anxiety or problems like blushing should be blamed on evoliution.Now if someone is into science this would explain alot knowing that it took thousands of years for humans to evolve,and its been only around few 100years that people changed the most,in others terms speaking in our society you dont need to fear of everyone or fight for survival,like humans needed to do that 1000years ago.So i think it gonna take another few thousand years for evoliution to chase us up,anyway i hope someone will understand my idea