One of my favorite biking garments is a pair of bib shorts, by LG I believe. Let's face it, it works like a girdle and holds my gut in

In the winter I wore a technical shirt underneath the straps so it was pretty darned comfortable. Now that we've succombed to Al Gore's hoa.., whoa, I mean now that global warming is upon us, I'm wondering. Do you still wear a base underneath the straps when it gets warm? I didn't today, and my back is still itchy.
What would an OCP do????