My point was more that it's invisible. You're basically risking it if want to fuck (sort of like STD's, granted) but on a more grand scale, because unlike STD's this can spread beyond you (and your partners).
I don't necessarily want to "tut, tut" folks that want to bump uglies. But I feel it's... rash... to do that, with so many folks (like Beibs, old folks, yourself/person fucking in a way) being affected.
Then again, I also tut-tut the folks going to the beach, etc. I get why (to get out of the house, avoid cabin fever), but that doesn't make it a "smart" thing to do.