Is there any way that I can reduce the amount of sleep I need voluntarily? Right now, I need a lot of sleep (ten hours or more) and I would like to reduce this so that I can sleep healthily for eight hours a night. Is this possible, given the way that my body works? I have heard that it is, that I can "train" my body to require less sleep. It certainly isn't healthy to sleep fewer than eight hours if my body needs ten, of course. And I'm sure that some people are forced to sleep for six or fewer hours a night for years! Do their bodies just adapt?

1) Are wet dreams in a sexually active 23-year-old male unusual?

2) I only had about three to four "wet dreams" in my entire life and now I'm 20 years old. I wonder if it is normal, or it's because I masturbate often that I don't have these kinds of dreams. Is there a way of having one like that again?

3) I have a normal sex life with my wife (once or twice a week), but I have been having a problem lately. I have had about four wet dreams last year. I don't know why but I feel really bad about this. Is there something wrong with me? How can I stop this???

As an avid contact wearer, I use saline solution to rinse my contacts daily before each use. Recently, a friend told me that many commercial saline solutions contain preservatives, which could affect the overall health of my eye. Is this something I should be concerned about? The saline I use has always felt comfortable so I never thought it could pose a problem.

I read that disposable contact lenses are actually worse for your eyes than the normal one-year ones because they allow less oxygen to go to your eyes, and the only advantage is that there are less cleansing problems. Also, it is claimed that inadequate oxygen to your eyes (possibly caused by prolonged wearing of contact lenses) leads to a condition when extra blood vessels sprout around the iris, which leads to sight problems at old age. Is that true?

I am very concerned because I normally wear (one-year) contact lenses from 8am to 8pm, and maybe to 12am during reading periods. I don't feel very comfortable with glasses because they give distorted visions and fatigue. I thought switching to disposable contact lenses would do my eyes good. My current lenses contain 38 percent water. Is this good enough?

I have recurring insomnia which lasts for about eight to twelve days. It seems to begin at about the same time each month. What are the common causes of sleep disturbance? Any suggestions?