It should also be mentioned that while rape is technically sexual misconduct, that is not the main reason why it is horrible. Framing rape in terms of sexual misconduct takes the risk of making violent, destructive assault merely a matter of lust or self-indulgence. Not every unwholesome action can be linked to the precepts anyway - your could torture someone to the brink of death and still not be in breach of the first precept should they end up surviving.
Gain and loss, status and disgrace,
censure and praise, pleasure and pain:
these conditions among human beings are inconstant,
impermanent, subject to change.
Knowing this, the wise person, mindful,
ponders these changing conditions.
Desirable things don’t charm the mind,
undesirable ones bring no resistance.
His welcoming and rebelling are scattered,
gone to their end,
do not exist.
- Lokavipatti Sutta