Surname "Black" ?

Why the pornstars use and abuse of the surname "Black" ?
The list of examples is long : Nicole, Kristy, Alex, Rebecca, Joanna, Liza, Lydia, Liberta, Sophie, Sarah, Ani, Kate, Amy, Angel, Jessy, Nataly, etc..
Personally, i prefer when they use a surname from their own country like Anya Akulova or Luna Corazon, it's sexier !
What's your opinion ?
The list of examples is long : Nicole, Kristy, Alex, Rebecca, Joanna, Liza, Lydia, Liberta, Sophie, Sarah, Ani, Kate, Amy, Angel, Jessy, Nataly, etc..
Personally, i prefer when they use a surname from their own country like Anya Akulova or Luna Corazon, it's sexier !
What's your opinion ?