When a man bust a nut on a females face

When a man rubs his penis like a paintbrush all over a girls face until he cums

Sperm on a girls face

In the same vein as painting her nails -- describes the 'occupation' of a woman that only entails sitting at home and doing nothing while her partner does all the breadwinning.

The term stems from women applying make-up as part of their apparent vanity pastime, hence the 'painting' term.