Why don't I bruise?

I used to bruise when I was a kid. Normal black/blue/dark yellow/green whatever.

Somewhere between my teens and 30s I stopped bruising. No big bruises, no little incidental bruises you don’t even know how you got. Why would I bruise as a kid but not as an adult? Is this a good thing?

Children’s skin is thinner, than a young adult. An older adult’s skin is thinner than a young adult and looses much elasticity. You’ll likely find yourself getting a lot of bruises when you age a decade or two. Childern will scald and burn faster also.