For danbooru purposes use this tag only when a character’s preference is clearly referenced. This could simply be through comics, included in a character profile, or by wearing clothes that mention it.
A bottom is usually the receptive partner during sexual penetration. This frequently refers to MSM who are penetrated via the anus during anal sex.
Bottom may also describe a wider social context of submission within a romantic or sexual relationship, though this element does not apply to all people who prefer to bottom. For example, a power bottom may refer to someone who takes a more dominant role while being the receptive partner.
In gay male sexuality, a total bottom is someone who assumes an exclusively receptive role during anal or oral intercourse. A versatile bottom is one who prefers to bottom but who tops occasionally.