Only one requirement - 'er ass mus' be firm and small
Sorry, all I found was flabby and huge.
I'm married so it would be out of the question, but this guy is one good looking hunk. Yummy.
Aidan Turner of Poldark
As a Trekkie:
https://en.wikipedia.org/wiki/Jolene_Blalock (as she was in c. 2000)
https://en.wikipedia.org/wiki/Linda_Park (as she was in c. 2000)
https://en.wikipedia.org/wiki/Jeri_Ryan (as she was in c. 1990)
As a male blessed with the capability to see:
Lots of other women, some of which are reptilian humanoids, but I'm not a racist. Most of all, though... Carrie-Anne Moss (as she was in c. 1998)