Service - an explanation

At one time in my life, I thought I had a handle on the meaning of the word "service."

"It's the act of doing things for other people."

Then I heard these terms which reference the word Service :

Internal Revenue Service
Postal Service
Telephone Service
Civil Service
City & County Public Service
Customer Service
Service Stations

Then I became confused about the word "service ."
This is not what I thought "service" meant.

So today, I overheard two farmers talking, and one of
them said he had hired a bull to "service " a few of his cows.
BAM! It all came into perspective. Now I understand what
all those "service" agencies are doing to us.

I hope you now are as enlightened as I am.