Upvote:3
In general you can bring personal items as you wish. The caveats are
- Above a certain monetary value you may have to look at specific customs regulation
- The items need to be legal in the departure and destination country
- The items should be legal on all layover/stopover country
- It's easiest if the items you bring don't violate any cultural or political sensitivities in all countries you touch. It's not necessarily a show stopper, but can add significant hassle to your travels.
Bringing vibrator into New Zealand is no problem at all. However, having one in your carry on baggage during a layover in certain middle eastern countries may be one. Same goes for DVDs: it really depends on what's the content.