Saving weight when touring by bicycle, can you take it too far?

This is a cautionary tale that's worth bearing mind when you come to pack for the tour. Judith talked to a member of our walking club during a ramble. We are well known as cyclists and enjoy discussing cycling, so we are often asked our opinion about cycling matters. It turns out that the member and her husband started to save weight when cycle touring using hotels by not packing any nightwear. We assume they slept in the altogether. All went well until they found that the hotel they'd booked had showers/WCs across the corridor from their room rather than having facilities en suite. We always take simple night attire: a T-shirt and a pair of boxer shorts for me and an old thin light weight nightshirt for Judith. I don't think the extra weight adds much to the load.