Well, I didn't really ok the Spark drink, but it seemed like you were dead set on drinking them so I said "if you must". As long as the PROTEIN is coming from the whey, if there's a secondary much smaller amount of soy (like soy lecithin or whatever, not soy protein isolate) in it that's ok. It's the soy protein that is the issue.
While I don't really think artificial sweetener sways pink, most people would want to give it up totally just in case. Your call to make, because we have gotten a lot of boys conceived while people were using artificial sweeteners and I no longer buy into them swaying pink at all, but at the same time, the traditional recommendation is to avoid them all except stevia/Truvia.
When it comes to hubbies, we just have to roll with what they're willing to do. If he won't do the suggestions, we have to let that go and just sway in the ways we can control! :)
Re the sleeping in the nude, even if he's in baggy PJ's that will work, it's those tighty whiteys we are trying to avoid.