Is there any way to apply a list of "tags" to products [In the Paypal Shop App],...

I am trying to implement an "if you like this product, you might also like these products" type of section at the bottom of my product.html pages.

It seems like a great way to do this would be to basically use an individual product's tags (if they even exist) to search for similar tags. I figure since assets and blog posts have tags, products might as well (or maybe there is similar functionality I am missing)

IE, if I was selling neopolitan ice cream, I would give it tags of "chocolate, strawberry, and vanilla"

Then, I would like to use these tags in a perch_shop_custom() array, to display other products with those tags, so that any products containing any one (or more) of those 3 tags would be displayed.

Is there currently any way to do this, or something similar?

Right now the best I can come up with is to simply list other products from that category with a "sort-order" of RAND.

Anyone have any better ideas?