This kind of sex can be very pleasureable if both are willing.
Just use a towel under urselves. I would not go down on my partner though cause 1st she doesn't want me to and the
idea that I might ingest (u never know) some of the discharge which her body is rejecting might not be the most healthy thing to do. Make sure he's aware of that fact before he dives into it.
I usually finger my lady while I suck on her titties or while
she sucks on my little buddy and when both are good an ready we proceed with the drilling for rubies, ( u know red) lol,,,
ENJOY IT..

Anyway whats a little blood between friend or Lovers...lol