I think that the older one was probably aware of the law, though likely not the penalty. She probably also didn't think they would get caught (which also implies that the prosecution will have a hell of a time producing physical evidence. The younger girl probably won't want to testify against her girlfriend, either).
As for alternative determining factors than age...some countries do it by physical weight. The classical one for women, of course, is the first period (a la Game of Thrones). However, all three of these factors completely miss the mark on psychological readiness. 18 is supposed to be a catch-all age to avoid exploitation, but I've certainly known 18 year olds who weren't ready for sex.
As for alternative determining factors than age...some countries do it by physical weight. The classical one for women, of course, is the first period (a la Game of Thrones). However, all three of these factors completely miss the mark on psychological readiness. 18 is supposed to be a catch-all age to avoid exploitation, but I've certainly known 18 year olds who weren't ready for sex.
