I've been thinking this ever since I saw the criticism of Colbert. It did not strike me as either homophobic or misogynistic when I first read and the saw Colbert's monologue. I thought the use of "holster" was interesting as it echoes the sheath etymology of the word vagina. Also it doesn't imply action or skill. Cocksucking is a skill and am action, and the passive "holster" seems to indicate that it may be beyond Trump's competence, much like just about everything else.