It's a term many are familiar with, but loathe to ask what it is when in the company of an Asexual person.
An Asexual person is simply someone who does not experience sexual attraction - that's the short version.
But according to www.whatisasexuality.com, aces (shortened version) can be any sex or gender or age or ethnic background or body type, can be rich or poor, can wear any clothing style, and can be any religion or political affiliation.
And like heterosexuality and homosexuality, it is a sexual orientation. To clear up any confusion or misinformation, Buzzfeed did a series of videos, including
Ask An Asexual Person.