Live long and get some...

Want to see Captain Kirk get Spock-blocked?

Spock on!

This scene is from the Original Series episode titled "The Cloud Minders (Wikipedia link)."
When the woman is introduced, the man next to her, who is her father, declares that she is a work of art, which is what prompted Spock to say that. He was being flirty, but more in a polite way than being actually interested.

The episode itself is a social commentary on racism/classism, and the reason the woman is so excited to meet a Vulcan is that she thinks she'll finally meet an individual whose species is as advanced as her culture (stratosians) in comparison to the people her society oppresses (troglytes).