On-line thesauruses are very sparsely populated when it comes to antonyms of 'tumescent'. The first handful I looked at didn't contain more than three - detumescent and deflated seem to be de rigeur but I didn't even find 'flaccid' until the third.
I'm seeking suggestions for less common alternatives. Come on ladies, how do you describe your partner's little soldier when it's having some down time?
AJ