Implied obscenity sync

Many years ago, I published a poem on my blog and then later deleted it because, as pleased as I was with the technique, the content was just a bit crass. Here's how it began:

I'd like to tell you, if I may

A thing that happened just today.

My story's clean, I think you'll find

Unless you've got a dirty mind.

See, while I'm lunching at the Ritz,

This woman with enormous eyes

Walks right up to my table, sits

Beside me, and eats all my fries.

I tell the woman I'm not rich

And think she is a little rude

For sitting at the table which

I booked and eating all my food.

The unwritten rhymes get progressively obscene from there, so I'm not going to reproduce the whole thing.

For some reason, this old poem popped into my head this morning while I was on the road. I started mentally reciting it to myself in all its implicitly offensive glory. Then, a few minutes later, I passed a pedestrian who was wearing this T-shirt:

Like my poem, it is literally innocuous, containing obscenity only if it is supplied by the reader's own mind. To the pure, all things are pure.