A Impact Play, S/m, Power Exchange and Ethical Non-Monogamous dynamics bottom role. Refers to a person who has testicles, who is on the receiving end of CBT, castration or cuckolding play [when that play doesn’t involve feminization]. Whereas a Bull is a masculine-identifying, high-stamina person who engages in sexual topping, a steer is a masculine or non-binary identifying high-stamina person who plays either in a submissive or victim role that may involve bottoming for sexual activities, or just receiving the castration play, CBT or cuckolding itself as the main focus of activity.

Steer derives from the english term for a castrated bull, so has been adopted as an emasculated counterpart to the Bull. The most common kink role adjacent to steer that commonly incorporates castration or CBT is sissy, where there is a symbolic feminization of the role, that is not in any way the case with steers.