Understand 100% ... we enjoy mfm with a guy we know pretty regularly. We don't use rubbers and most of the time we cum in her.
Him and I have no problem licking her after one or both of us have cum in her but it's after she's wiped off. We don't "clean" her, we do enjoy preforming oral on her because she LOVES it. Yes I can definitely taste sperm. It's the exact same kissing her after she's swallowed a load. Kissing a couple of minutes after is a huge turn on for us.