I have been using fridge clips (the kind with a larger plastic clip and a little magent on the back) on my slaves pussy lips. They have a larger grip and can be left on for a bit longer then clothes pins or clover clamps. I also drilled a hole through the ends and tie them off to subbies calfs or ankles or arms or whatever. That way I can also use them to keep her still (it hurts like hell to pull these off straight away - they don't feel so bad when they are clamped but they have serations on the face to keep them from slipping). I can use these alone and tie them off to her ankles and it keeps her legs spread and up close. Also have tied them off to her cuffed hands behind her back (around the body, not through the legs) to keep her nice and open while I 'gave her a shower'. I ha ve found that they really help keep her still.

Just a suggestion. I don't like using tape because even when she is shaved clean it is still a bitch to clean up and it turns the skin red if you leave duct tape on too long (even 5 minutes can be too long for some places). Very irritating to the skin and it can last a day or two.

Play a bit and see what works for you. Just remember to come back and share your findings.