...tired

Water, ice, vapour, freezing, sublimation, condensation, melting, evaporation...
One substance, many different phases...
Phase transitions arent for free, H2O must pay for this, sometimes gains heat, sometimes loses heat, but always must pay.
Phase transitions arent caused by H2O desires, they ocurr because of changes in temperature, pressure, density... but always external to H2O, so... this must be too hard to stand.
H2O suffers changes constantly, moreover without his consent.