Tongue, I find, is always best - let the woman have an orgasm, or two, and then proceed. That's from my Tantra classes and I try to abide by it! Just FYI - when you first get with a supersize woman, it's going to be different than with thin women, and you may have to go through and overcome awkwardness. Like the first time trying to get her doggy-style, it may take a couple of tries, and correctly positioning your knees so they don't hurt, and such. Also, some guys are so insane about being inside a huge woman from behind that they come in less than 30 seconds - it's pretty explosive! Don't let that happen. Above all, communicate and remember to have fun, and that it's ok to stop if something doesn't seem to be going well. Good luck with your super fat honey! SSBBW are the BEST! :)