Tantra and sacred sexuality.

I was wondering if anyone can help me out... a month from now I will spend one week with a man with the purpose of exploring sacred sex... and I need information about tantra or what I can do, and how we can prepare to make this experience amazing... we want to experiment fusing with eachother and the all... but I've never done this before, at least not consciously, and with a man who is not my couple...

We're both single, so all is well on that side... he just wants to create a space in time for us to experience heaven, so to speak... and I decide dto give it a shot...

I hope you can help us!
Love and gratitude,
Aida.