Using a soft, comfortable surface for this sex position is vital. Not only will the penetrating partner's knees be pressed firmly into the surface, but the penetrating partner's body weight may press the receiver's hips into the surface as well. Experiment with your surface, and feel free to add in pillows and blankets if any particular place is causing discomfort.
The Private Rubdown position is friendly to a variety of bodies. The comfortable laying position can lend itself well to those with limited mobility, wheelchair users or or those with chronic illness or pain. For someone with Cerebral Palsy, Muscular Sclerosis or Muscular Dystrophy, this position as the receiver would be ideal. As the penetrating partner's body weight can still be a pressure point, we recommend open communication to ensure the receiver stays as comfortable as possible throughout the position. Talk a lot about your access needs as you move through this position.
Leaning over of someone, like the penetrating partner in this position, can strain the back over time. Especially if you choose to explore massage within this position, the penetrating partner may be leaning for a long period of time. Communicate with your partner and find ways to alleviate back strain as necessary. The penetrating partner may choose to lay down next to their bound partner for a more comfortable, one-handed massage that focuses more on skin-on-skin contact than deep pressure. You may choose to place the receiving partner on the edge of a bed to allow the penetrating partner to occasionally stand to continue the massage. Experiment with different positions to see what can alleviate any discomfort.
Since this sex position lends itself so well to massage, it must be noted that massage oil should never be used for vaginal sex. Oil-based lubricants can be inhospitable with the vagina -- and oil-based options can also break down your safer sex barriers and make them less effective. Instead, if you'll be transitioning from a massage into vaginal intercourse, simply swap out for a bottle of water-based lubricant.
If penetration isn't on the docket for whatever reason, the Private Rubdown position lends itself well to frottage. The "penetrating" partner is in the perfect position to grind and rub against the soft tissue of the butt. With grinding, the receiver doesn't even need to be unclothed; it can easily still be done while wearing clothing to work within everyone's comfort levels.
While the Private Rubdown is shown with the receiving partner as the bound partner, this position can easily be swapped up by simply making the penetrating partner lay face up within the restraints. This can allow the receiving partner to then climb on top for penetration -- and allows for some hot eye contact too