1. mushrooms, i eat them on pizza sometimes, not a big fan so i don't really know
2. sleep through the night, i have never in my entire life slept through the night unless im drugged, i have to pee, or my kid has something super exciting he must tell me at 2am, or such and such, so i don't know.
3. massage, i dont see why not, i sleep on my stomach and lay on my stomach for other things, like by the pool or whatever. like they said, just empty first, maybe take some immodium so you won't have anyoutput
4. period, mine was such a mess i had it all the time, like nonstop, literally! i ended up with a mirena just to stop it.
And on the hottub, i have stayed in ours for hours on end and had no problems, it probably has to do with how good of a seal you have in the first place or how hot the water is. Now i will say, we got in a friends and it had way too much chlorine, so much that it actually ate at the plastic! but in mine at home, ikeep the chemicals correct and the temp 99-101 and havent had a melting problem, so far anyway