I live on a college campus and have noticed many people do not wash their hands after going to the bathroom! I was so shocked, I confronted one of my friends. She replied: "If I don't get anything icky on my hands, I just rinse them withOUT soap. If my hands do get 'dirty,' I wash them with soap." Is her handwashing philosophy correct? Does rinsing your hands withOUT soap do any good?

I have looked through your archives but have not found an answer to my question. I was diagnosed and treated for chlamydia about a month and a half ago. Do I need to get rid of any sex toys I have? Is it possible to become reinfected by using a sex toy that you used while you were infected if you wash it before using it? Please help me find the answer to my question. I really need to know ASAP! Thank you in advance.

Some of my family members insist on using the same towel for drying themselves perhaps 2 or more times before washing the towel. They claim that dirt and germs are washed off during bathing and that using the same towel and rehanging it to use several more times is not unhealthful.... I disagree and say the towel then becomes bacteria infested and when they re-use it to dry themselves that they are putting this bacteria on their bodies. Thanks for looking at this.

1) I often have a bad taste in my mouth, and bad breath as well, I assume. This doesn't stem from poor hygiene: I brush my teeth at least three times a day, and usually more. I'm wondering if there is anything I can do about this. Could this be a symptom of some sort of nutritional deficiency? I think my diet is pretty bad, although I'm working pretty hard on getting more protein and eating less fat. I've also been nauseous a lot lately, and vomiting some. Could that be related?

2) Like many people, I often have an embarrassing bad breath. Listerine and other mouthwashes won't be of any help for this chronic problem. There are lots of products available to get rid of "volatile sulfur compounds (VSC)" - that supposedly cause this — and I just don't know which one I should try. Also, what's your opinion on tongue-brushing?

1) Which is better for you, tap or bottled water?

2) How bad is the water here in New York City? Do you recommend drinking filtered water, or does it really make a difference?

I've been swimming a lot this summer and I have noticed a green tint to my blond hair. Is this caused by previous dyeing? Is it possible to remove the green tint? Thanks for your time.

Can I use deodorants on my penis?

I have dandruff that responds well to over-the-counter shampoo. Ergo, I have been using the stuff almost exclusively for ten years. No brand in particular, sometimes zinc pyrithione (the blue stuff!), sometimes coal tar (the smelly brown stuff!). Anytime I switch to non-dandruff shampoo for like three to four days straight, I get my dandruff back. I worry that I might be addicted to dandruff shampoo. Should I worry?

Ever since high school, I've had very oily hair and skin, but it became worse in college. Now I'm in my mid-twenties and have to shampoo my hair about 10 times each day to get it clean. Then by evening it's already oily again. This isn't my scalp trying to moisturize itself after being over cleaned, because I've tried not washing it completely and it's even oilier the next day.

Are there any special shampoos or medications that help reduce oily skin? I've tried some facial products from my dermatologist, but they haven't reduced the oil production. This is an embarrassing problem and limits the overnight activities I can do, like camping or staying with friends.

What is the significant difference between a product that is antiseptic and one that is antibacterial? All of the antiseptic mouthwashes I find have a great amount of alcohol in them. This can be very irritating to the mouth. I have found one that is alcohol free, but it says it is antibacterial.

Thanks for your help.