I think I probably have medium-sized inner labia, and they are actually quite sensitive. It feels good to have them touched and tugged (or licked and sucked). It wouldn't make me come, but it still feels damned good.
As to my outer labia, they really don't have much sensitivity (or are just not an erogenous zone for me)? so messing around with them is a waste of time that could be better spent on other things.:biggrin1: