Paper manufacturing is not devoid of chemicals, it needs bleaching to be white and all the machines to put it in its final shape use mineral oils that find way into the final product. But maybe the quality of the tea itself dwarves the things you find in teabags.
Bleached paper is probably not a threat to testicles, but it's taking a toll on the environment they're living in. And it's for a frivolous reason: having snow white paper.