No
If someone says no during sex, it means they want to stop. Very confusing, especially if just consented to having sex; but if they say no it means no.
The leader during sex?
You are having an orgasm?
By "do" I assume you mean a very disrespectful scumbag way of sexying 'have sex with' - yes, you can have sex with a women during menstruation.
It means avoiding sex during certain times of the month.
that sort of answers itself
They are probably referring to using protection (condoms, birth controls, dental dams) during sex - oral sex, anal sex, and vaginal sex.
That is a discusting question that does not deserve an answer!
no, not at all
That sounds like hurrying up, to get to orgasm quickly.
They usually get darker during sex because they get filled with blood when you get aroused. That goes back afterwards.
Not necessarily: almost all men will enjoy having their prostate glands stimulated during sex (with women or with men) if they are open to experiencing that.
nothing really, just means u like it! it happens to me :)