[Seahorse_Boi]

I was wondering if anyone has advice for a safe and successful inflation, or at least tips for a beginner? My main questions amd concerns are: What materials do I use? Where do I find them? Which is better, air or water? What are the risks involved? Will it scar my intestines or cause internal bleeding? How effective is Coke and Mentos? How long does it take to "inflate"? How long does it take to "deflate"? Does body structure matter?(I'm assuming that having a slender frame yields distinguishable results)