Can Someone Explain This To Me?

[GrandizerII]

Asexuality, like with anything else, is a complex phenomenon.

Here's what Wikipedia has to say on this subject:

Asexuality is the lack of sexual attraction to others, or low or absent interest in or desire for sexual activity. It may be considered the lack of a sexual orientation, or one of the variations thereof, alongside heterosexuality, homosexuality and bisexuality. It may also be categorized more widely to include a broad spectrum of asexual sub-identities.

So, broadly speaking, to be asexual you have to either lack sexual attraction to other people or lack a desire to participate in anything sexual. I think it has to be enduring lack of desire as well, but not sure.

Note it doesn't mean asexual people do not nevertheless have sexual activities with others (or themselves), whether to impress others, to experiment, etc. It also doesn't mean you can't have romantic attraction to others.