While I generally agree with wearing the correct[-ish] size trousers ...
... be aware that most clothes designed for vagina people have either no pockets or little details that are pockets in name only (they may hold two coins and a lipstick, but nothing useful like a wallet or celphone). Presumably this has something to do with wanting nothing so cumbersome as a moneyclip to detract from the wearer's natural form, but it is still surprising that so few items of female clothing have functional pockets -- not everyone is a supermodel every waking hour.