Harold & Kumar-love is very much in the eye of the beholder. If you are upset, offended or turned off by any of nudity, racism, blasphemy, drug-addled toddlers, puppets with over-sized “parts”, sweary Santa Claus, more swearing, gratuitous violence or Neil Patrick Harris, then this might not be for you. If that sounds like your sort of thing, then proceed.
To be fair, from the look of the trailer this should be very funny stuff if you can stomach the more extreme content and aren’t concerned by non-PC behaviour. Likewise, the 3D seems to be amusingly employed, which is more welcome than unnecessary retro-fitting of blockbusters that don’t benefit from it anyway.
Don’t watch this with your boss, your mum or anyone young or delicate. For everyone else, proceed.