These two vixens are getting ready to play doctor. She needs to be sure that her partner is physically able to get fucked before they start sex playing. A little check with the Stethescope to see that her tits and heart are ok is the first step.

Next she needs to know that her ass is ready willing and able to take a pounding. She inserts a butt plug to make sure it fits and it will stretch her asshole a bit so she can put a big dildo in it later. Don’t want her to have to take too big a shot to the ass at one time.