Why there is a MAC address on a switchport

[jootyar@hotmail.com]

I do understand that the managed switches must have a MAC address for manageability access as well as the STP. 

My question here is: 

Why there is a unique MAC address on every switch port of a layer 2 Cisco switch?

[Reza Sharifi]

Have a look at this post. Long, but a lot of good info:

https://community.cisco.com/t5/switching/address-of-a-switch-port-generic-question/td-p/2029517

HTH