it is NOT always easy to identify....
The general rules are already been explained above by EMN, Fubar and PM.....some have visible traits while most are hidden.

****Sorry Guys....I was about to go for Lunch....so could not contribute accurately!

It is a secret mission inside somebody's head (gay activity)...

It is a mental sickness (for few) and scientifically it is genetical disorder and could be treated by medical treatment while certain man having gay behaviourism (caused due to brught up with all females at home) can be treated by counselling.

All gays are not the victims of natural disaster but they are 'Eunuch', a disability since birth.

Let you know guys; when Rehab centre open.