 Sometimes the bottom character will be the aggressor in the relationship, or the pair will switch their sexual roles., a contraction of the English word "reversible", is used to describe a couple that "yaoi" fans think is still plausible when the partners switch their "seme" and "uke" roles.In another common mode of characters, the author will forgo the stylisations of the "seme" and "uke", and will portray both lovers as "equally attractive handsome men".