[Belly Button]

I've always much preferred real/bare belly simulations as there's a true sense of realism behind it. A real sense of effort to expand your own belly as far as you will comfortably let it. You can get at least some visual sense of what it would actually be like for your own, real, belly to be pregnant - albeit likely somewhere in the first half of it depending on how big you can get it. No special effects, no fake bellies - it's actually your own, real belly. 

This is in no way 'having a go' at those who use fake bellies e.t.c. It's of course each to their own at the end of the day. For me though, there's just something much more satisfying seeing someone's real belly, including my own, expanded a little beyond it's regular size. 

Indeed, there are some out there who put their own health at risk and it's something I would never recommend doing. For me personally, I know my own limits. I can get myself to quite an impressive size with having a few good meals in a day and having beers (such as enjoying the usual things you'd expect to do if you were on holiday or away from home for a few days...). Of course I'd love to add a few more inches to my waistline by doing this, but I'd never make myself ill in doing so. At that point I'd revert to using my imagination. Fantasise in being larger or then physically use something like cushions and pillows!