What kind of dance do they have in mind, is it the Tango, Waltz, Quickstep or the Paso Doble? This is the time to lay it all down, what you will and will not engage in.
Sex should be between a man and a woman, but you may be surprised to find out that your Christian FP also thinks it’s okay to bring visual aids; such as porn or making your own “home movies” into your marital bedroom. You need to know right now before you say “I Do”. We are all at different levels in our walk of faith; do not ever assume that because they are believers they do not have an obscure way of thinking.