That quote doesn't mention social media? It mentions computer games as a possible explanation, and then explicitly says none of the things listed is a complete explanation. The article speculates that social media may be related, but what I'm asking is what the commenter thinks is the specific connection between social media and a decrease in sexual activity.

The OP comment essentially said that Social Media was causing massive catastrophic social change. I'm not seeing that backed up in the article, even if I think I may agree.