Confusing 'Chemistry' Image of the Day

This image appeared in an NPR Shots blog post outlining the CDC's recent recommendations on male circumcision:

Source: NPR News / Corbis Images

Please help me understand - What on earth do the floating molecules have to do with this story? 

I grok that the image suggests two men deep in conversation. The article doesn't mention any drugs. Nor bodily substances. No pheremones, hormones, biomarkers, or viral particles enter the conversation. Just another case of stock images gone wrong?