This is a hugely common question, and not an unfair one.
If you are a lady thinking about having sex with a woman for the first time, a man who gets seriously turned on by lesbian sex, or are just plain curious as to how it all works, rest assured that you are not alone.
It is important to remember that fantasies are just that:
Since the latter two require the presence of the first, you could say all we nixed was the dick.
Having an open mind and listening properly will keep this topic from being shrouded in mystery, awkwardness, or fear of offending, and be considered the wonderful, fulfilling, awesome thing it is.
Lesbian sex can be dirty, carefree, experimental, boring, awful, brilliant, loving, emotional, and everything in between.
If you have any other questions that you want to be answered, hit me up on Twitter!