nothing at all
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.
ALL of it.......wear a CONDOM
so they can clean themselfs and it helps it keep it clean
People do say it does taste better
Some women like the taste of ejaculate, while others don't. It all depends on the women and their taste buds. Most girls do not mind it thought.
Ejaculate is not urine. However, ejaculate and urine all kind of hang out down there in the same area, so if you were to want to "taste" ejaculate, you could very well also be tasting urine, since they are "neighbors".
You ejaculate without any feeling at all, at a random time
Well lets think about this, your assumption is flawed! All Vagina's in your words "Reject" the ejaculate, not just your wife. The Vagina is not a receptacle that consumes ejaculate. it is a potential space that allows the ejaculate to line it then allows the excess to drain away. pour water in a plastic bag & it occupies the some of the potential space that the bag can create. The Ejaculate stays there as long as the bag is upright, turn the turn the bag upside down and it all drains away. A Vagina doesn't absorb the ejaculate, doesn't drink it, doesn't consume it, it accepts it in the short term, then allows it to drain away. A few million of the sperm in the ejaculate may go for a swim, but the billions that are washing around in the bulk of the ejaculate drain away, it is & always part of the plan.
Only if your ejaculate shoots all the way to another woman's vagina, then no.
yes, rub it all over and into their nose, then help him ejaculate
Yes, pre-ejaculate, also known as pre-cum, may contain sperm. It is possible for sperm to be present in pre-ejaculate, although the likelihood is lower compared to ejaculate.