Also known as: 体外式ポルチオマッサージ, 子宫按摩, 体外式ポルチオ
Massaging or pressing down upon the Stomach beneath the Navel as a form of sexual stimulation. This can be done with a hand, a Penis, a Vibrator, or another object.
The location of the rubbing is higher than what is seen in Fingering or Clitoral Stimulation, being somewhere between the Pussy and the Navel.
An ordinary Belly Rub does not have to be sexual in nature, whereas this is.