Your colon doesn't need cleansing. Enemas just slow the natural process by pushing stuff the wrong way. They should only be used in medical situations when a doctor needs to look in there and doesn't want to (or can't) wait for it to empty on its own. Occasionally, people do get stuff impacted in there, but that generally happens as part of a serious illness, and again it's medical staff who should take care of it. A badly-done enema can cause a huge amount of harm, up to and including death, and there's no health benefit even from one that's properly done.
Neti pots can be helpful if you're congested, but you MUST use sterile water. A very small number of people have died from brain infections when amoebas in tap water got into their sinuses from their neti pots. They were a type of amoeba that's normally harmless because it can't survive stomach acids, but the sinuses are a happy environment for them. There's no reason to use a neti pot if you're not sick, though. The goo in your nose and sinuses is there for a reason, to help trap dust, pollen, pollution, bacteria, and other stuff that's in the air and stop it from getting into your lungs and then your blood.
Tongue cleaners... Meh. Whatever. I don't see how that could hurt anything, so if it makes you feel better, sure.
Honestly, it sounds like this author has kind of a sick, hateful relationship with the human body. She thinks it's dirty. The fact that "Sexy" is in the title tends to suggest that she's made some sort of psychological transfer-- if you're going to be sexy, that's figuratively "dirty," so you have to literally cleanse yourself. I think maybe it would be a good idea to balance that book with the "Grossology" series for kids-- it explains WHY our bodies produce icky stuff, and why it's healthy and natural.
| current weight: 132.0