What is the deal with Old Single Women?

Why are single women over 40 constantly in a bad mood? It's like everything & everyone bothers or annoys them, similar to ppl who are constipated, only indefinatly longer. I guess you can call that Depression. But only if they want to admit that, and get help from a shrink or some medication, they won't get any better. When they are in bad mood, either too quiet, or too irritated, they are effecting the spirit of the whole world. Someppl may not be pessimistic, but when they are surrounded by pissed old single women, how can that not makes them to become pessimistic?

So my theory is single women over 40 (especially the ones that are not dating) are horrors to society. We have to find a way to avoid them, or convert them.