Normal? Depends what you mean by normal but in terms of percentages then not especially.
Is it a problem? Do you find it a problem?
If you don't you might well be some flavour of asexual, not all that are find the idea of sex to be gross but some do and it is quite a wide field/spectrum. I don't know what the French term is (edit, apparently it is just Asexualité) but the English one should get you somewhere to start with. Afraid the main website I would link,
http://www.asexuality.org/ , appears to be down right now.
If you* do find it a problem then you might well have some flavour of disorder, again I have no idea what the French names for things might be but even if I did the same policy I have in English would be in effect -- I try not to use my limited knowledge here to diagnose people via text. In that case you might wish to speak to your doctor or someone in the psychology trade, there are a variety of things that can be done here.
*if your family and friends find it a problem and you do not then that is a different matter. It can be an odd one there -- if you said you were gay then even if they were some ultra religious idiots they might still be able to respect it as a concept, the lack of desire is so alien to some people that they have real trouble grasping it.
Hope you get to somewhere you are happy.
