a philosopher's orgasm
A philosopher's orgasm is when your brain gets so excited after a big idea it feels like it just had a 10-out-of-10 brain sex session.
He had a philosopher's orgasm when he realized his crush was also his neighbor.
She got one when she figured out how to beat her math test without cheating.
After solving the mystery of the universe, his brain had a 10-out-of-10 brain sex session.