异岁扮演或年龄差异扮演，是一种角色扮演型式的玩法。预先谈好一个跟年龄差异有关的剧情，当然要跟当事人目前年龄不同。

调教中可以包括性，当然也可以完全没有性交互的情节，有些还会加上性别倒错，来增加和现实的反差效果。主奴之间可以借由年龄差距来增加控制/服从的默契，让扮演者重温年幼时期的情绪和交互方式，借此获得不同的心理感受。

常见的年龄调教剧情，如家人间的乱伦（母亲亲身教学性教育、爸爸的宝贝、兄弟姐妹的秘密等），甚至会选择年龄很极端的小婴儿、老人。另衍生出如尿布癖（Diaper fetishism）、制服癖、西装癖等，代表年龄身分的恋物喜好。

Ageplay or age play is a form of roleplaying in which an individual acts or treats another as if they were a different age, sexual or non-sexually. Ageplay is roleplaying between adults, and involves consent from all parties. Portraying any age can be the goal of ageplay, from babies, to the elderly. Usually this involves someone pretending to be younger than they actually are, but more rarely can involve assuming an older role.