As long as we&#x27;re throwing out unproven but provocative theories along these lines -- I think I read something about how residual compounds from birth control passes through to urine and then into our water supply in trace amounts, triggering hormonal changes that lead to earlier puberty.  I like that one, it has a lot of things going for it: tainted water supply, culpability of drug companies, punishment for our hubris in thinking we could control reproduction, etc.