I don’t see “the other hand” as your example is one of inference, depending on ones state of mind, where the vulgarity I refer to is blatant and leaves nothing to infer.
But I agree there was a lot of sexual innuendo used that I didn’t understand as a youngster. Today’s youngsters are much better versed in everything sexual.
Yes, you’re right, it’s not really comparable. I really meant that colloquialisms and slang phrases often have more sexual referents than we might realize. That’s different from being graphically obvious, though.
Between the lost prurience of “in like Flynn” and the in-your-face ick of “hot AF,” there are usages such as praising a person by saying that he (or she) “has a pair.” Get a dictionary, people. We have pages of excellent words that clearly describe the qualities you can’t bother to specify!