liminetta I think your reaction is perfectly normal and understandable in a biological sense.
We are programmed to recognise abnormality - this was demonstrated by Prof Iain Hutchinson a few years ago when he made a documentary film about a patient with a gross facial deformity who he helped through plastic surgery. (He founded the charity Saving Faces which funds research into facial surgery).
He filmed her walking down the street and most people stared, then averted their eyes and rushed past her, pointedly looking the other way.
In an evolutionary sense, it was important for the species that weakness or abnormality wasn't perpetuated - the survival of the fittest. And if course medical diagnosis depends on recognising abnormality.
I accept that in some parts of the UK, and among some social groups, body modification is regarded as the norm and would not merit a second glance, but I would still maintain that a majority would think that multiple tattooings and piercings are not mainstream, and would feel an initial reaction, however brief, of repulsion, no matter how quickly it is overlaid with a civilised 'I wouldn't dream of judging anyone by their appearance' response.