<p>Kira is hetero but he loves only hands.
</p><p>He never had a wife, and I'm 100 % sure, that he also never had a normal girlfriend.
</p><p>He probably is not interest with sex with woman, and hand (not his hand) is enough for him.
</p><p>What about Shinobu? Well...she probably wants Kira/Kosaku, but like I write before - Kira is not interested with her.
</p><p>What do you think about it?
</p>