You found yourself a pretty ornate looking cow bell. You shook it and it gave off a clanging sound, and assuming that was what did something magical and nothing happening... Well it was probably non-functioning. It did however look nice, and would make a good talking piece at some point. The Cashier told you "We are not liable for whatever happens because of our clearance items." However thinking the thing didn't do anything basically ignored his warning, took the receipt, and left for your apartment. Seeing your girlfriend's car in the parking lot you wondered what she would think of the cow bell. Least you could show her the receipt considering you only had to pay 3 bucks or so for a nice looking paper weight.
Unlocking the door you went inside your shared apartment and said "Honey i'm home!" then started to take off your shoes.
Your girlfriend Cameron said "Hope your taking your shoes off!"
"Already am, Went to that "magic shop" and found something interesting."
"The heck did you get this time and did you keep the receipt?" Cameron said coming into sight.
You pulled out the cow bell and said "It doesn't do anything, but it looks nice!"
"That looks like it belongs in a museum... of bad taste. How much did that thing cost anyways?"
"Three bucks, and you don't even know what it sounds like."
"Well as long as it's on your desk, the heck does it sound like anyways?" You started to shake it and it let off it's not so elegant clanging sound. "yeah, that's basically a cow bell I-" Cameron let out a bit of a yelp and she grabbed her chest. It didn't surge much, but Cameron's breasts grew a cup size and some damp spots at her nipples. As Cameron took her hands off her chest to see if she could see the liquid at her damp spots and you saw her shirt was indeed a bit tighter. Wanting to test it out just a little bit more you decided to clang it a bit more and watched as Cameron's face got more flushed as her breasts were swelling with milk as the droplets started falling on the tile floor. Cameron yelled out "Would you fucking stop with the bell?!? God's hope this isn't permanent does that receipt even show what that bell's name is?"
Pulling out the receipt you checked the name and it read out "Bell of Milk Summoning *damaged*" pulling out your phone you decided to incognito search it and saw a small article on magikpedia (a wikipedia dedicated to actual magical phenomena) "Used primarily to get milk from Cows, although there are variations for goats, yaks, and other mammals farmers have used to get milk from." glancing around you saw "The artifacts use 3 primary enchantments, the first enchantment makes it so anyone who hears the bell will have their mammary glands activate to produce milk, the second enchantment restricts the effect to only females, and the third enchantment restricts the effect to a particular non-human species usually cows."
you said "Well nothing about if the effect is permanent or not, but I think I know what's broken. There is an enchantment on these that makes it only affect a specific non-human species, that probably got worn off or something. On the bright side we wont need to get milk from the grocery store right?" Cameron wasn't exactly happy with having her body modified to save maybe 4 bucks a week.