Collecting usualy comes in sets, sometimes for me it's in pairs!
One stamp is not so notable until you pair it off with another stamp from another country

.
In my early collecting days, I found it best to contact my friends for the topical stamp item I was trying to pair, and we would exchange. We both ended up with pairs!
So I collect Pairs - two of the same topic- person, object, bird, animal, plant, fruit or any same item, from two different countries!
Hope you can post your pic pairs

Here is a pair of JFK's from USA and Philippines

