I hope you ladies don't mind me jumping in here. I always kiss my partner after she goes down on me, regardless of cum. It's usually during foreplay. I appreciate her pleasuring me and I enjoy kissing her. Why would I screw up an intimate moment because of a silly hangup.
My ex enjoyed tasting herself on her own fingers or my lips. I thought it was really hot. Does it work the other way around for any of the women out there? Would it be sexy if he enjoyed tasting his own "product" or is it just nice that he isn't bothered by the idea?