Yep. Kill somebody, you're still held wholly responsible. Consent to sex, on the other hand, is far too serious a matter.

My general rule of thumb is thus: If you inebriate yourself, you're responsible for everything you do under the influence of alcohol, including consent. Your responsibility for your actions precludes actions intended to deny your own responsibility.

Which is not to say that sex with an unconscious person isn't rape; I limit myself strictly to those cases where the person does in fact give consent.