These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Actor Allusion: Dan Aykroyd plays one of two super-wealthy brothers who attempts to strip one man of his position and replace him with a nobody. This is similar to the plot of Trading Places.
Camp Straight: The performance of Galifianakis, plus the dogs, plus the fact that he had to be proposed to (six times) as opposed to being the one to propose, combined with the broad hints that his wife isn't getting enough of, well, him, the film seems be dropping hints that Marty is secretly gay. However, the lack of a coming out scene, or a getting found out scene, and the fact that Marty is genuinely hurt by his wife's infidelity, might possibly suggest that Marty is just a really effeminate straight man with a low sex drive.