An Asexual person is someone who does not experience the want or need to have sex with another human being. Asexual people can be any gender and may have a separate romantic orientation.  Asexuality is not the same as abstinence (the choice to refrain from sex and sexual conduct) or celibacy (The choice to stay single). 

An abbreviation of Asexuality is Ace.   

Here is the Asexual flag. 

[If I messed this interpretation up please let me know by DM ing me along with an explanation of what I got wrong.]