This is pretty asinine, but whatever. An adventurer never backs down from a challenge.
THE VERY BASICS
1. What constitutes the act of sex?
In its most vanilla form, it involves a man sticking his penis into a woman's vagina, thrusting, and hopefully an orgasm. The definition's kind of flexible, though.
2. Are there different types of sex? If so, describe them.
Pick a gender combination. Pick an orifice. Stick something in it. If we're referring to the anus or vagina, it doesn't even have to be a body part. It's also possible to mix it up with things such as rope or, if you have the money to spare, electricity.
MYTHS AND MISCONCEPTIONS
1. List three myths or urban legends about sex or contraception you know are untrue.
Vagina dentana probably only exists in certain species of demihumans or as the result of unfortunate curses. Eating the sexual organs of certain animals is not an aphrodisiac. Douching with certain beverages does not count as a contraceptive.
2. Can a woman get pregnant if she has sex during her period?
It's unlikely, but possible.
3. Can a woman get pregnant after she engages in anal intercourse?
Again, unlikely but possible if one is extremely messy.
4. Can a woman get pregnant if she has sex with a race of humanoid besides her own?
It's happened before.
5. Is it possible for men to get pregnant?
...not human men, thankfully.
CONTRACEPTION
1. List all forms of contraception you are aware of.
Not having sex, sticking to your own gender, condoms, those... potions, birth control pills, and there are probably more with varying levels of effectiveness.
2. Do you know what the effectiveness level of these contraceptives are? If they are used in combination?
Condoms aren't 100% effective. I've heard the pills are pretty effective, but I think they haven't been around long enough for any abnormalities to surface. Abstinence is the only 100% effective method, but you have to have the discipline of a saint to employ it. I think the combination of a condom and one of the pills/teas/potions/whatever would be a good bet, though. It's also highly unlikely that oral sex will result in a pregnancy.
3. Are you aware of any risks involved with their use?
Condoms break. The potions and pills leave you open to diseases, and there might be a health risk or two involved.
4. Do you know where to acquire any of these contraceptive devices?
You can probably get them wherever you get medication.
5. Who should you consult before using them?
Your partner. I don't really see why you should contact a doctor about a condom, but for the pills, it's probably a good idea.
SEXUAL DISEASES
1. What is a sexual disease? How are they spread?
...you're kidding, right? It's a disease spread by the exchange of fluids during sex.
2. List any sexual diseases you are aware of.
This might take a while. Syphilis, chlamydia, gonorrhea, genital warts, crabs, and, if you're having anal sex without proper preparation, infections from tearing.
3. How can you prevent contracting these diseases, or minimize the risk of doing so?
Condoms are probably your best bet. If you're engaging in anal sex, lubrication will probably prevent tearing while making the whole process a lot more comfortable.
4. Are there any treatment options available?
For some of them.
MASTURBATION
1. Do you find the subject embarrassing? Why or why not?
Not really. It's not something you talk about in public, of course, but it happens.
2. How often do you engage in it? Do you think that is normal?
This is an intensely personal question, but yes.
3. Would you feel comfortable discussing the subject with any future romantic partners?
Probably, yeah.
5. What are the benefits of masturbation? Are there any negatives?
It releases sexual tension in a safe way. As long as you do it in private, there probably aren't many negatives.
6. List any urban legends or myths you have heard about masturbation.
Every time you masturbate, the gods kill a kitten. You'll go blind. It'll fall off. You'll get hair on your palms. Need I go on?