There is a hidden physicality rating, which determines how often a player fouls and gets fouled.
Is it written somewhere? I've read it somewhere else, but I couldn't find it in the rules.
When I read it for the first time, it seemed to me like the "since I have no other explanation (which is my case), it should be it..." :-)
It usually fouls defending. Many are not even shooting fouls (that's why I doubt of the SB root cause).
Thanks all for the replies!