Hylas surprised by the Naiades, by John Gibson, is a sculpture which I loved when I first saw it, and I was delighted to find it back on permanent exhibition. So I now have my own photos of it.
Technically, it is amazing. Consider the delicate way the hair curls on her neck:
And the pressure of their fingers on his skin:
and the way the cloth drapes and flows:
And then, see her hand on his face:
See also Omphale, the legend of a Queen who dominated the hero Hercules.