You need to protect yourself from the possibility that you may pick up or cross infect each other. If she then moves them energetically as she or her partner approach orgasm, the additional stimulation can be mind-blowing. It cannot be too strongly stressed that any caress calculated to overcome fear in a hitherto inexperienced woman must be applied with the greatest gentleness.
Study Looks at Nude Images' Effect on the Brain - Sexual Health Center - herbertkikoy.info
So how are you going to do this?