Messy but it is safe.
Yes
Yes it is safe
no
Yes, it is perfectly safe to do so, unless there are medical reasons not to.
Yes
no
The sperm is usually discharged during intercourse. That one of the prime reasons for intercourse: for male sperm to get into a female for fertilization of her egg(s).It depends on what you mean by "safe". It is the natural method of procreation.
Yes; intercourse is perfectly safe throughout your entire pregnancy as long as you, the female, remains comfortable or your doctor orders you to refrain from sex.
yes
Yer just be safe
It is safe at any time, but do you ask in respect of falling pregnant?