Oh ETA this gif...
... is from the answer to Seven of Nine's question about coffee. Mulgrew made a funny retort and then realized (?) what she said and did the face palm.
I watched it several times. I guess its because I am not a native english speaker. Or: maybe I am too naiv
I did not get the comment about the cream in the coffee and why it would be embarrassing.
JanewayRulz! : from your question mark I guess I am not the only one puzzled - am I?
She said: "I take mine with a little cream, if you know what I mean. (pause) I don't even know why I said that."
Could anyone explain that to me? Please?