Dongpoint

The apex of a dong when mapped as a 2D mathematical graph. When extrapolated, the turning point is defined as the Dongpoint.

Alternatively, it can be characterised as a deeply philosophical question some penises ask upon ejaculation. Normally, he questions the creation of the universe or is seen riding the existential roundabout.

'Sir, I have found the Dongpoint on this particular graaph'
'Chuffing good work Porter!'

'Derek! Your penis makes me think too much during sex!'