It's been my observation that when someone (M or F) makes derogatory comments about one genitals, and/or breast size, it's said in the context that the person who owns said genitals, etc., actually went up (to the counter) and requested a small dick or small breasts, like the person made a bad choice or something similar, as the comment usually ends with a smirk or cute comment, like the person is less of a person because (s)he has a smaller than normal (or smaller than the commentator's standard) genital,, etc. Its always been my conviction that "it's the writer, not the pencil" which makes the difference