Why is it that when a person vomits, it causes others to vomit — even when they don't have an illness causing it? Is this something triggered by the brain or is it something that happens by reflex (survival instinct) for someone to vomit since, perhaps, what the first person was eating may affect the second who vomits as well?

I've been eating the yogurt Activia and have felt less stomach grumblings since. I switched to just a low-fat yogurt for cost reasons and have had the grumblings come back. Is Activia really better for digestion or is this all in my head?

Both my boyfriend and I have warts on our hands. Can these warts be transferred to our genital areas?

I was thinking of buying a face powder that says it has an spf of 30. It seems convenient to have a powder sunblock since lotions make my oily face greasy. However, I was wondering if this powder will even be effective as a sunblock since I heard that some moisturizers and other products that advertise an added SPF sometimes don't have a high enough concentration of sunblocking ingredients to make it effective. I would like to know what do you think before I make my purchase.

I am living in a residence hall, and I never realized this until now, but my bowel movements are really smelly. It has gotten to a point where if I don't find a place to do it secretly, it becomes a great source of embarrassment. Could I be eating something that causes my bowel movements to be really smelly?

The few times I have tried anal sex, I get a horrible case of the farts afterwards lasting hours. I do not have the ability to hold it and it's very embarrassing. Is there anything I can do ahead of time or after to stop this?? Thanks

1) I am a male with inverted nipples.

I was wondering if there is any way without surgery to make them come out. They do sometimes come out when it's cold, but go straight back in. I am not overweight, but I do no sports. Would physical activities help???

2) I have inverted nipples. Is there anything that I can do to make them come out? I think that they are unattractive inverted. I have tried massaging them daily as doctors and magazines have suggested, but they do not stay out. They have only come out a couple of times when my boyfriend has sucked on them. Is there something wrong with them? One doctor said that I might have to get a minor surgical procedure.

For years now I've been digesting my meals within an hour or less. I am able to see whole food in my bowel movements of meals that I have just eaten. Any idea as to what's wrong?