Condons are bad for oral sex because the limit the sensitivity of the skin. If a condon only covered the tip of the male organ, it would be equally effective and there would be no sensitivity limitation. It should be kept in place by a non water-soluble adhesive, similar to the one used for dental protesis.
A system that registers the yes/no opinions of politicians in a number of issues. The user can be matched to the candidates to find the best fit. We have a preliminary sample, in Spanish, partially adapted to the Argentine current status.
We can create a similar product for any country or political entity.
On many occassions an attack does not leave time for pressing a panic button. Either because the button is out of reach, or because the attacker threatens to shoot if the victim activates any alarm. A small heart rate monitor, the kind that comes in wrist watch form, or attached to a smart cellular phone, could do the life-saving action. Today a local bus driver suffered an attack that costed him two fingers, because he was reaching for the panic button. The heart-rate alarm could be triggered seconds before the assault actually occurs, acting as a deterrent. Also, thieves would see no point in shooting a person because he got too scared, maybe with no intention to push an alarm button. Main targets for this invention are bus drivers, banks, jewelry stores, gas stations and other similar places.