To be honest, if someone's inquiry is "dfk" first thing and I do meet them, it's more often than not bad, aggressive, wet slobbery kissing and right away.
I kiss, and consider it a specialty of mine, but when it's done like this I can't show off my skills and feel like just giving up. It ceases to be a mutual act, and something gross being done to me that I don't want.
And like another provider said, oral hygiene is a must and if in this situation it's subpar or worse, it becomes something I want to try to get out of.
I've had more than one awful experience with this, and am ready to banish dfk to the tundra. I offer lfk and it becomes more than lfk naturally, so be it -- it is then a mutual act I enjoy.
I do like kissing, but not my face being eaten.