Not to get all scientific, but packed inside the soft and luxurious silicone exterior is a miniature heater that gets up to 104-degrees Fahrenheit. This raise in temperature really adds a new dimension in pleasure and makes the experience feel life-like. Mix that in with some strong vibrations and you have a recipe for some extraordinary orgasms.
Heating promotes circulation, and circulation helps with arousal. Like many heating lubricants and gels on the market and metal dildos that can retain heat, promoting blood flow to the genitals is a natural way to increase sexual arousal.