Hahaha... aiyor... it's easy to see rite... semen when left
standing for several hours under the air-conditioned environment
will soon turn transparent and you will see the typical whitish
spots on the small pool of fluid. If it is phlegm, it would have
evaporated or it would have moved according to the train's course
of destination, like when it makes a sharp turn, the phlegm (which
is fluid-like) will follow as well...
Semen is not that easy after ejaculation because of its content
that is in it, it sticks after left for several minutes...
