In human style it is represented by the letter "X".
The spread eagle may also be a sex position in which one partner lies on their back facing up supine or less commonly lying facing down prone with arms and legs spread wide apart.
The face up versions of the position are popular for oral sex play or erotic massage.
As a humiliation technique it is popular for forcing the subject to display their genitals and to provide unhindered access to the crotch, groin and sometimes anal region for sexual play and torture. When the partner is lying face down, it is a variation of the doggy style a variation of the missionary.