Oh NCIS: LA, how are you so gay?
1. They have the same ideas at the same time. Which means they have to look at each other, finish each other's sentences, and occasionally have a third party ref their interactions.
2. When G asks "when have I ever had mail?" or some other personal thing, Sam has the answer.
3. The intro montage? OH HAI. It's the two of them standing side-by-side, the two of them smiling at each other, the two of them posing near the beach as the sun goes down. GAY GAY GAY.
4. When showing how a murderer came up behind his victim and cut his throat, Sam comes up behind G and um, demonstrates. Gently.
5. Since G is shorter than Sam, Sam is always putting his hands on G's shoulders. 'Cause they're like, GOOD FRIENDS.
As for the NCIS plots and contrivances? Suspended disbelief. I can do it.