Singing in Showers

I agree autonomous singing in the shower should be related to traits and mood. I thought it was until I saw this thread. Hopefully personalities will be improved at some stage so that traits have more depth and impact on behaviour like this. My main sim almost always sings in the shower, but he is a music lover with max singing skill so this is perfectly in character. I will have to pay more attention to see how his mood impacts on this, but I have heard him crying in the shower before when he's sad (which makes me sad lol). His partner sings in the shower sometimes too, but he is a cheerful sim so I guess it isn't necessarily out of character for him either and his singing voice definitely isn't as good.