"Tap",
From the hitchhikers guide to the web,
Tap
V
Tap, to deliver a short light blow designed to alert the senses via touch or sound without causing injury
V
To surveil a person or entity's telephone or computer typically without the persons knowledge
V
To open a beer keg
V
To realize a sexual fantasy
V
To utilize the potential of a subject, ie to source

Brotherhood falls asunder at the touch of fire!
He finds his fellow guilty of a skin
Not coloured like his own, and having power
To enforce the wrong, for such a worthy cause
Dooms and devotes him as his lawful prey.
~William Cowper