Guess they're not shy.
Actress Jessica Stroup -- who plays Erin Silver on 90210 -- engaged in a long and very public make-out session with her boyfriend (and former co-star) Dustin Milligan after having lunch together in Hollywood on Wednesday afternoon.
Watch the video here on RadarOnline.com
Fans of 90210 will remember that Dustin played hunky jock Ethan Ward on the first season of the show, before being dropped from the cast.
The two sucked face for several minutes - seemingly unaware of people passing by.
They've been dating for about two years.
Ah... young love!