The fact that they didn't have middles was of no concern. Adaptors could be bought for tuppence each and came in all shapes and sizes.
It being a Sunday, having started something of a tradition this time last week, I've tried to commit to canvas a few of these small but perfectly formed appendages.
And, just for good measure, I've chucked in a couple of videos. The first one was what Gerry Rafferty had in mind when he wrote Stuck in the Middle with You. It's followed by Quentin Tarantino's now infamous interpretation of same.