We are ALL oriented one way or the other sexually. There is NO SUCH THING as an "asexual" human being.
In our egalitarian new world it is often accepted that every one has the right to their opinion and further,that all these opinions have equal status in the market place. Fortunately that is not true but unfortunately,most people don't realize that. The fact is,only those opinions based on facts and knowledge,in other words truth,have any value.
I,on the other hand cannot state that "there are many who are asexual". Nonetheless,I think it is an issue worth studying.The answer might shine much light on an several important matters in the Church and in society.