I think I can relate to the "point 1" that seems to be confusing everyone.
WG's when they "clean up" after the act will peel off the condom, then wipe around the base of the cock and balls, which has probably come into some contact with her during sex (and may be covered in her juices after a particularly good session!) Some WG's then proceed to use the same wet wipe to clean off the end of the cock, often with an exposed bell-end, essentially transferring her bodily fluids onto the part of the cock you've so carefully protected with a condom in the first place.
Whether this is anything worth worrying about or is just paranoia is debatable I suppose, it's certainly low down on the risk scale below even a bit of genital rubbing. But it just seems common sense to be safe by cleaning the end first, or just using a separate wipe. Sadly common sense is something many girls in the business don't seem blessed by (no offence intended to the ones who are!)
I assume that's what OP is referring to, as it's something which has vaguely bothered me at times. But I don't want to speak on his behalf, perhaps I've also misunderstood what he meant.