Sex of Red Fox?

Observation - Sex of Red Fox? - UK and Ireland. Description: Two foxes seen, distinguished by extent of mange on tail. One squatted to scent mark feeding site after eating (on two occasions); other appeared to lift leg like male dog. Does this indicate sex of fox too?

Two foxes seen, distinguished by extent of mange on tail. One squatted to scent mark feeding site after eating (on two occasions); other appeared to lift leg like male dog. Does this indicate sex of fox too?