This is a test of commonsense. Complete the next sentence:

How to explain asexuality to somebody
Introduce the topic to them.
It could be something such as: " do you know what asexuality is? " some people already understand asexuality, so you may save yourself some explaining and awkwardness if you ask what they know first.
Explain what asexuality is in your own words.
Do this especially if you yourself are asexual. People are more likely to be receptive if you are sincere.