The Perfect Temperature
Basically there has to be a perfect internal temperature for the penis to expand the most and make the most of the stretching that occurs during exercise. It’s been talked about before, but there seems to be a lot of variation in opinions. Based on the science I’m going to say between 106F and 110F is ideal. Greater than 106F produces the most benefit and 111F is the common pain threshhold. The internal temperature will always be slightly lower because of circulation, so we want our surface temperature to approach 110F. I’m getting a thermometer to use in my cylinder and a temperature gun (laser) to check the surface and see if I can’t calibrate my heating methods…
“Raising the temperature of tendon tissues above 103F increases the amount of permanent elongation that results from a given amount of stretching (Laban 1962; Lehmann et al. 1970)”
“At about 104F, a thermal transition in the microstructure of collagen occurs, significantly enhancing the viscous stress-relaxation of collagenous tissue and allowing greater plastic deformation during stretch (Mason and Rigby 1963; Rigby 1964; Rigby et al. 1959)”
“Vigorous heating, >4°C over core temperature (which would be 41C/105.8F) increases collagen tissue extensibility and decreases tissue viscosity and tension.”
HOWEVER
“Human skin burns to varying degrees of severity as the applied temperature rises. Humans begin to feel a burning pain when skin temperature rises to 111 degrees Fahrenheit, with first-degree burns developing at 118 F”
(If you Google any of these quotations you’ll easily find further info)