Also known as: 種付けプレス, 种付位
A Sex position similar to Missionary position, but where the top person's body (usually a much larger male) obscures most if not all of the bottom's body, leaving only their legs and lower body visible, if that.
The position's name alleged that this is the most "optimal" position for reproduction purposes, and as such is often associated with primal instincts. The female equivalent is Amazon Position.
This position may be juxtaposed against a completely innocuous image of a character for comical or erotic reasons, typically in Instant Loss images.