Well you can't get pregnant since you already are but if you want to protect yourself from STDs you need to use condoms.
Only if your ejaculate shoots all the way to another woman's vagina, then no.
Tampons do not cause pregnancy, the fact that a tampon was pushed up inside you have absolutely no relation to pregnancy what-so-ever. If you had sex and ejaculate got into your vagina there is a chance of pregnancy, but as long as you used emergency contraception chances are slim.
You actually don't have to penetrate at all, you just need pre-ejaculate or ejaculate to come in contact with the females vagina to get her pregnant.
A man can ejaculate inside your vagina while you're menstruating as long as you are using some form of birth control to prevent unwanted pregnancy (unless you are aiming to get pregnant) - although you cannot get pregnant during your period, you can get pregnant as a result of sex during your period if the sperm survives long enough in your vagina to meet the egg once you ovulate after menstruation.
Whether or not a woman gets pregnant has nothing to do with how long a penis was inside her during intercourse, and everything to do with whether or not any seminal fluid makes contact with her vagina.
you put you're penis inside a womans vagina and go back and forth you ejaculate(cum) inside her and the sperm (cum) will impregnate the egg she has inside her
Sperm needs to be deposited inside the vagina during sexual intercourse for pregnancy to occur.
You can ejaculate just at the entrance and don't have to go inside. Sperms swim.
Yes, either way you slice it, its sperm entering the vagina, which can possibly fertilize and cause pregnancy.
No, the only way for a woman to get pregnant is for semen to enter the vagina, unless you ejaculate on your hand and put in in her vagina, she will not get pregnant.
No, the semen has to come inside of her vagina.
No, this is very unlikely. The penis must be in or at least at the entry to the vagina with nothing between the two. The male must also ejaculate, or at least pre-ejaculate for any chance of a pregnancy.