I'll assume you're old enough to hear this. 1 Virginity is when a person has not has full penetrative sexual intercourse (the penis has not entered the vaginal passage. 2 Humans are the only animals that use any form of protection to have sex for other reasons than procreation. There is no problem for someone to lose their virginity to unprotected sex, especially if it is within a loving relationship, such as a marriage. 3. The female hymen MAY be intact before her first sex, but it equally may have already broken for a multitude of reasons. There are no other changes. Yes, there is 100% likelihood that I am not HIV positive. This is because I trust my wife implicitly, and she trusts me implicitly. Sex doesn't have to be something dirty - within a loving relationship it can be something beautiful and to be cherished. I hope that with time and experience you will grow to understand this.

I will address the No.4 part of the question because it is the most important issue you have. You are never 100% sure someone does not have HIV. For one reason some people have been born with HIV, due to the parent having it. So be careful.

1-People define their own virginity for themselves, but it usually has to do with the sexual stuff they've (consensually) done in the past. 2-Not much? It's personal preference mixed with risk management. 3-Intercourse (provided it isn't forced/violent) won't physically cause genitals to change shape. The hyman is just a layer of skin that stretches across the vagina, but it's differently shaped (sometimes webbed, sometimes just a thin strip across the middle) for each person and a very large number of women are born without it/it has gone away of its own accord by age 20/it has gone away due to other things (eg sports like horseback riding) 4-For me I think there is.

1- Someone is a virgin if they have never had sexual intercourse before (penis in vagina). I don't know how to define virginity for gays and lesbians, I'm a straight girl. Virginity is the quality of being "pure", in other words never having had a penis in your vagina. 2- There is absolutely 0 gain in having unprotected sex your 1st time. And, by the way, it's not true that you can't get pregnant on your 1st time. Unprotected sex is NEVER a good idea unless if you are married, at least 25 years old, own your own house and are ready to have a baby. Methods like the pull out and other garbage don't work. You should ALWAYS use condoms and sperm killing jelly. Take the day after pill ONLY if the condom breaks, your guy didn't wear it, etc. 3- Losing your virginity does very little to alter a woman's anatomy. There's a small, worthless piece of flesh called the hymen flap that rips your 1st time and you bleed a little. It doesn't change how you menstruate, poop, pee, clean yourself after going to the bathroom, shower, etc. Getting your hymen ripped causes 0 changes in your life. However, 1 word of warning: on your 1st time you must make sure that the guy is really gentle, if he's mean or hard on you it could hurt REALLY BAD. 4- When it comes to HIV you must sleep with someone who has it in order to get it. If you are monogamous with someone who doesn't have it, you'll be OK