Joseph Luften and Harry Inghamin created the Johari model in 1955 with an objective to help people understand and give feedback on their disturbing behaviour towards others. This window model shall provide insights of the behaviour of others and oneself.
There are four quadrants of Johari’s window model –
a) Open – This is known to oneself and others
b) Blind – This is unknown to oneself but known to others
c) Hidden – This is known to oneself but unknown to others
d) Unknown – This is neither known to oneself nor to others
They'll most likely cacth the skin fungus too. the towel may wipe off bacteria of the fungus and dead skin cells, and the other person using it may be wiping those bacteria and dead skin cells on them too.