The fundamental particle responsible for manliness, the testeclon caries with it all properties typically associated with being
manly. The only known source of testeclons is testicles.
The testeclon is a massless particle, and thus can travel an infinite distance, which it does at the
speed of testacularity. The
speed of testacularity is constant in a
vacuum, equal to T=Ac^2, where c is the speed of
light, and A is Bamfington's first coefficient,
100 seconds/meter. However, unlike the speed of
light, which only decreases when it
light propagates through a medium other than vacuum, the
speed of testacularity can actually increase when propagating through some mediums, for example, women, or giant killer robots.
The fundamental equation governing the propagation of testeclons is: (lambda)(nu)=Ac^2, where lambda is the wavelength and nu is the frequency of the testeclon in question. The energy and momentum of a testeclon are equal to the same value, unlike other particles, and can be determined by the equation p=E= B (nu), where B is Bamfington's second coefficient, equal to the biggest number you can think of plus one. Testeclons are
non-Heisenbergian particles, meaning that they are not subject to the uncertainty principle. This is because testeclons are always certain of what they are doing, and thus don't have to screw around with maybes or probability functions.
It is possible to determine how
manly someone is by analyzing the intensity of testeclon radiation emitted.