"There's a lot of things we could do with this," he agrees, and chuckles, his mind inevitably following along the same lines as Ianto's. "It would be very interesting to see how long it took Spike to notice it. Although he might just get worried that you weren't getting hard for him like you usually do!"
((OOC: LOL @ my "sensitive skin of his sock" - quite a different meaning from the intended one!))