I feel like kids are (probably) hard on fabrics and textile coverings, teenagers are hard on everything, and adults are hard on foam supports (if only because weight and body size). Just some assumptions!
Yeah, that seems about right. My kids like to jump on every part of the couch (arms and back as well as the cushions), but their weight (or lack thereof) prevents them from being able to do too much damage. We don't have teens yet, but I suspect that they'll continue to abuse the furniture (sitting on the arms, for instance) while also being heavy enough to do damage.
