I’ve never kept anything in my back pocket, on account of not wanting to sit on stuff and the discomfort of doing so, that’s even when I even have one (not being a jeans person). “Bendgate” was largely blamed on back pockets as I recall though.
Yea I know that only women have their phone in their back pocket. One thing that all or most guys do is have their phone in their right pocket, then everything else in the left.