Mutilate as well as penetrate

1. The following text describes this https://www.999design.com/site/assets/files/1237/silkcut_56.jpeg. Is "and the elliptical slit, foregrounded by a lighter colour showing through" OK or should it be "and the elliptical slit, backgrounded by a lighter colour showing through"?

2. Does "mutilate" mean "to harm and damage"?

Text:

It was in the first instance a kind of riddle. That is to say, in order to decode it, you had to know that there was a brand of Cigarettes called Silk Cut. The poster was the iconic representation of a missing name, like a rebus. But the icon was also a metaphor. The shimmering silk, with its voluptuous curves and sensuous texture, obviously symbolised the female body, and the elliptical slit, foregrounded by a lighter colour showing through, was still more obviously a vagina. The advert thus appealed to both sensual and sadistic impulses, the desire to mutilate as well as penetrate the female body.