Answer:
Dry though I may be, I am still a sea.
An utensil used for bread. Also a paper cutter. Used by a thug to take a life, Or wielded by the tamest wife, When used to spread the butter.
What can be measured but has no length, width or height?
Brings celebrities into your home every night.
I can be found in seconds, minutes and centuries, but not in days, years or decades.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.