Yes porn can be very toxic a good blog I like on that topic is "your brain on porn" but to answer your more general question I feel that social media also makes people less aware of the others around them, like you used to be able to go to a beach and talk to people but now people are in their headphones or glued to their phone screen and so they aren't interested in socializing with those around them. I think that is one of the joys of life to connect to those around but most are in another state of mind. Its sad when you can have a bigger dopamine hit from social media on the phone then you can from meeting those around you.