If I have a receiver that generates 130 watts @8ohms, and speakers that handle it, why would I need an amplifier..as many of you seem to include in your systems?

I do plead ignorance here!!!
I recall friends in college ( 35 years ago!) having an amp with their system, but never understood what the benefit is??!!!

I'm sure many of you can enlighten me !!!!!!!

looking forward to your input...convince me I need one!