Digital Kiss (concept | by Howard et al, 2004)
A device, smaller than a phone, communicates in symbols that have been handwritten and programmed. To send the message the user places his/her lips onto the screen in a kiss. The machine scans her lips with dimension and depth.
Source: Howard, S., Vetere, F., Gibbs, M., et al. 2004. Mediating Intimacy: Digital Kisses and Cut and Paste Hugs. In Proceedings of the 18th British HCI Group Annual Conference on HCI (BCS-HCI’04). 45–48.