Not usually but if the other person has an STD, be careful.
I do not think there is such a thing as a standard shower.
when you sneeze on your hand
Yes. From saliva . And razors, if they have blood on them.HIV is rarely, if ever transmitted by saliva that has been exposed to the air. and not in direct contact with an open mucous membrane.
yes
Utensils ... knives; forks; spoons, etc.
Yes. But she still has to come in contact with the std. Sharing needles thru drug use is a good way to get one.
You can't get chlamydia that way. Chlamydia is transmitted by oral, anal or vaginal sex; by genital-genital contact; from sharing sex toys; or from an infected woman to her child during vaginal birth.
You can spread mononucleosis by kissing people, sharing utensils, or having sex. You can also get it from being coughed or sneezed on by infected persons.
HPV is usually passed by some sort of sexual contact. A person needs to either have sex with someone who has the virus or have some sort of skin to skin contact with the area (warts). A person can NOT get HPV from sitting on a toilet seat, shower, sharing drinks or food, a pool, etc. Check out this site for more information on HPV: http://www.cdc.gov/std/HPV/STDFact-HPV.htm
You can clean mineral deposites from your shower head by first using the right cleaning utensils. Plungers, detergents, vinigar and baking soda are some of the basic things needed. Every once in a while you should use these things on your shower head to clean it.
The collective noun is a set of utensils.
utensils that are unique!