I think it's ironic that people think 'panties' is verging on pornographic. My MiL always said that and she was very very proper. She thought knickers sounded crude and pants were for men, hence panties for women which she thought sounded more refined. But I never liked it as it sounded twee to me.
I think it's shame that once perfectly acceptable words like moist, flaccid, erect etc have become associated with sex and therefore seem a but pornigraphic. As I said earlier a moist cake is fine, so is a flaccid plant (which needs watering) and tents need erecting. We are losing so many words thats used to be ok. Other examples are pussy, muff, and beaver all of which were once used innocently. I learned that hard way (by teaching in a secondary school) that some words I learned as a child could not be used as thy caused sniggering!
Sorry, got a bit off track there!