I've owned my girl for some time and although I have been rough with her in the past, I am interested in trying to leave marks after a particularly rough session. I'd like to bruise her around the thighs and hips, etc, but don't want any breaking of the skin or cause any serious damage. We both find the idea of her being marked highly erotic and are eager to try, but her safety comes first. My questions are:

What are the best tools for this?

What are some of the best actions to take?

What kinds of marks do other doms enjoy leaving? Where? How do they go about it?

Are there any dangers we should be aware of?

Thanks in advance,

Zen