Miranda Kerr & Evan Spiegel Nerd Fantasies Do Come True

8/13/2015 7:06 AM PDT

Miranda Kerr and Evan Spiegel -- Nerd Fantasies Come True (PHOTOS)

Snapchat founder Evan Spiegel is proof it pays to be a computer/social media geek ... not because of the $2 billion he's worth, but because he's got supermodel Miranda Kerr hanging all over him.

Spiegel, who's only 25, was with his smoking GF Wednesday about to board a flight out of LA -- and Miranda made it clear ... she has no issues with PDA. 

Things have been heating up between Evan and Miranda since they first started hooking up in June.

See that kids? Go hit the books!