about informal calls

Some friends are just like family .There is no need to make formal arrangements for a visit.Except for these very close friends and relatives, makeing unexpected calls should be avoided as much as possible . The unexpected guest is welcomed, but whether that welcome is sincere or given out of kindness is another matter.practically everyone has his own plane as to how to spend his time, and it is often perplexing,if not annoying, to be obliged to change one's plans by unexpexted visitors.when someone invites you to drop by anytime, they reallymean first to make sure the time is convenient!