Boys talk about girls. Girls talk about boys. Boys talk about boys. Girls talk about girls. Human sexual attraction is natural. Using human sexual attraction as a joke material to lighten up the room is culturally acceptable. That being said, if every other sentence of ours is about how to hook up, where to pick up, and how erotically charged we are, we, then, can be taken as one-dimensional. There are a time and a place for everything. If we don’t pay attention to the occasion and act always as if we are home at all time, we can easily be described by others with words that are not necessarily complementary.
Comedians understand how important it is not to be perceived as one-dimensional. Comedy is a format of story telling that relies heavily on its shock factor. Familiarity doesn’t produce shock factor. Hence why comedians need to broad-stroke on a variety of subjects so that the occasional mention of their sexually based statements can produce the intended shock factor. Most would argue that it is precisely because of the unexpectedness of the shock factor that grabs the audiences’ interests and keeps them on the edge of their seats. If a comedian talks about the same topic repeatedly, the shock factor will quickly lose its impact.