Spec's Garden - I am thinking of a complete change

Got quite a bit of work done today, cut and moved a lot of wood then started filing in, but as the soil level was rising I noticed that the base retaining plank was moving out, so decided to go back to the beginning and start again once I had it cleared I fitted some metal pins into the base board and hammered it down to sink the pins into the ground, I think this will be the permanent bed as I don't fancy trying to move that board out, started to replace the logs and soil but unfortunately it started raining quit heavily and feeling the glowers from SWMBO I thought I had better stop.
Can anyone tell me why do wives think you will get a cold just because you get wet: