According to folklore, vampires cannot enter a house unless invited by the owners. Afterwards, they can come and go as they please (wrecking havoc in the process).
Do not ask me why I know this little piece of information. I just do.
What I have found interesting is how they do not explicitly invite themselves.
For example, they do not say “can I come In please?”
The employ more tact by making you feel it was your idea all along to invite them into your abode.
That is the same way laziness and bad behaviour can creep in with subtle hints which become full blown menaces.
As the good book says: “a little sleep, a little slumber, a little folding of hands to rest and poverty will come upon you like a thief…”
It is necessary that we take proactive steps to ensure that we do not allow complacency set in.
At every point in time, audit the checks and balances in your life to ensure they are effective enough to prevent parasites.