Matan1-
Not all Poskim agree it is permitted to shower at all. And even if it is, it not permitted to take a regular shower. There are levels; cold water, without soap, not entire body at once etc.. A Rabbi must be consulted.
The Halschic system permits a shower for those who are an “istanis”, those who cannot handle the lack of a shower and therefore ask their Rabbi for a leniency. My point was, that if we really felt the Churban, we would not ask for a leniency. We would not even feel the discomfort of not taking a shower in perspective to what we really should be feeling during these days.