There are lots of different recommendations because different things are right for different people.
If you guys are doing the every 4 day method to boost conception then have DH abstain between them. This is because he needs enough time to make a decent sized batch or you aren't boosting conception anyway!
If you're just doing it after your one attempt to cover in case of delayed O OR are doing it because you can't ever get positive OPK and you have irregular cycle, then you can have him release between the e4d attempts. This will cut odds of conception (like - a LOT) but may sway more pink.
RE pork, annoyingly this is something we are not sure about. Pork is high in protein/fat and has a lot of nutrients in it so I tend to lump it in as red meat BUT some animal studies have indicated that the Omega 6 type fats, of which pork has a lot, may sway pink. Plus a lot of pork things like bacon and hot dogs are barely meat at all LOL and I consider those to be pretty good for pink swayers (even ladies) since there is not a lot of nutrition going on.

