Once upon a time there were two young couples who among other things used to go camping together.Now time has passed and one of the older ladies wanted to write to one of the older men to send him a few visual memories, to wish him well with his visit to hospital and hopefully put a smile on his face. This is what she wrote.
Dear Friend, ! was sorry to hear that you are having a spell in hospital and hope that you make rapid progress and get home soon. I was wondering if you remember anything about Set Theory, in particular the Intersection of Sets. A ∩ B = ( x : x Є A ʌ x Є B ) So if we say that A represents the list of possible ailments for a man, and B represents the list of possible ailments for a woman Then 1. I am quite happy to empathize with you if your present trouble lies in the Intersection Set A ∩ B as it would be quite possible for me to have the same problem as you 2. I reserve the right to smirk whenever your ailment is such that A ∩ B = ф , i.e. your ailment doesn’t fall in the intersection set and there is no way in the world that I could possibly get that problem. 3. But I give you permission to smirk, gloat, snigger, grin, jeer, leer and generally poke fun at my distress in the nicest possible way if any ailment that I should suffer from also doesn’t lie in the intersection set and that there is no way that you could acquire that problem. So….. whether your ailments lie in A ∩ B or if A ∩ B = ф GET WELL SOON.

So creative B, and shows off your math skills as well. Love it.
BTW, the photos are cool as well.