Good/bad form British old-fashioned noun
Good form means morally and socially correct behaviour or actions.
Offering your seat to the elderly on the bus is good form.
Bad form means socially unacceptable or inappropriate behaviour or actions.
It is considered bad form to ask other's salary.
When you experience extreme and undesirable situations, it is probably essential to take extreme actions
A desire to do something, which is random, sudden and unaccountable
people often do irrational or foolish things when they are in love.
Reduce or avoid your chances of the future failure or loss by trying several different possibilities instead of one
The origin of this expression is not clear.
Friendships will develop well and be successful when the friends respect each other's privacy.
You should respect your friend's privacy. A hedge between keeps friendship green.