Best bike accessory I've bought recently is a set of "Knox" "Dry inside" underwear.
It certainly makes removing your leathers much easier on a hot day & leaves you feeling dry & comfortable.
I tried wearing just the underwear below my leathers on a morning ride to work at 6am in the UK (in August) but found I needed an additional layer + winter gloves! for warmth. So much for the British Summer!

Highly Recommended