I guess the most important thing at the very end of the day is that you both love, care about and respect and trust one another. Then you're comfortable doing whatever together. Whether it be in the boudior or where ever you do "it".

I guess you just get to a point in your relationship eventually where you're trusting each other and are comfortable with each other so much that you're prepared to do just about anything for or with each other (within reason of course)- but of course healthy relationships have their boundaries too! Good luck with being on the top, bottom, side, upside down, inside out. . . etc. . .