Nothing comes to pass that is not shown in the radix....that's an old and established axiom.
And "signatures" are, in my experience, useful as "flags", or as substantiating/contributory factors, but to be effective must be found within a matrix (the whole-chart indications) that supports their manifestation. And brutal killers are sometimes shown (by the whole chart) without expected signatures.
Put the chart of a serial killer, a homosexual, a glutton and a recluse in front of 100 people in this forum, and only a handful will see those traits within the personality of the natives of the charts. Whether we can see such things or not depends to a very large extent on experience and perspective.
Sharon Tate's chart provides an example -- from my personal standpoint -- of not seeing what is there. Except for the Sun-Pluto opposition (with Mercury, of course) that involves the First House there is nothing in the chart that, at first glance, seems to indicate her tragic end. There are no typical "signatures" of brutal murder to be seen.
Until you look closer. Still, there are no signatures, configurations or positions that might normally be associated with violence against the person of the native. But, the chart on close examination leaves no doubt. I speak of the radix, without reference to progressions, directions, transits, profections, returns or what have you. That the indicators are there is one thing. That I didn't see them is another. The "signatures" are very much unique to her chart.
Sexuality, whether unexpressed innate tendencies or manifest reality, is shown in every chart. Our sexual expression is always a very powerful force in our lives. It is biological and undeniable. This includes the spinster, the insatiable hedonist, the man whose lusty nature is constrained by his religious beliefs or fear of social ostracism.....all of us. Sexuality is far more a question of psychology than of physical manifestation. And our sexuality, whatever its form may be, is an expression of the whole self...which is why it often is not described by typical "signatures".
And by the way, I did not open this thread on purpose. I posted a reply to a post in another thread and the reply suddenly became a thread on its own without my intention. I have not participated much in the discussion because it is full of opinions and closely-held positions that lead to acrimony.
But I will suggest to those who maintain that sexuality is not shown in every chart that they might reconsider. If the approach to chart reading is fluid enough, open enough, inclusive enough....you will find that our mode of sexual desire and expression is indeed shown in every chart.