I try my best to shower as often as possible, I'd prefer to shower once every day or 2 depending on activity, but unfortunately depression does prevent me from practicing any sort of hygiene for random and sometimes long periods of time, much to my embarrassment and the annoyance of those around me.
Trufact - for most of us guys there are only 4 areas we normally wash directly - hair, face, armpits, groin area. The rest get the soap runoff. For me I haven't been able to reach below my knees in well over a decade.