First, Lala's arrival alone, okay... so King Gid wants an Heir for the throne, pretty understandable (and Truth in Television)... until you realize that Interspecies Romance is in their way. Sounds hopeless? No, Lala has been known well with Gadgeteer Genius tendency and able to turn male-into-female in a snap. That alone proves HOW ADVANCED Devilukean science is in terms of genetic engineering, it's either Lala turned into her husband species or said husband turned into a Devilukean...
Mitigated a bit since Darkness introduced her mother, Seraphina, and we now know she's a half-deviluke, half-charmian hybrid so it seems that Devilukians can cross-breed.
As a corollary bit of horror, in the anime version of To Love-Ru, Lala's official engagement ceremony involves her suitors groping her breasts. It is not specified if she has to be nude, although she was with Rito. Just take a look at all her other suitors, she has at least four in the anime, besides Rito. Ren, Ghi Bree, Lacospo, and the guy with the Rocket Fetish. Gid and Lala imply there are still more of them out there...
Second, Gid's threat. No matter how comedic that chapter is started, he's definitely damn serious. Why? He's been involved in a large scale interstellar war to the point his body shrink, Insignificant Little Blue Planet indeed...
Then there's the way Yami's "darkness" is shown activating in Chapter 39...
It may have taken 66 chapters of Darkness for Mikado to diagnose Rito's condition, but rather than dub him "Patient zero," she pulled up a document with a proper name "Cataleptic Indecency Syndrome" and a thorough checklist for symptoms, not to mention special gear for treatment. Ladies, and Gentlemen, this indicates that somewhere out there in the universe, there are other people who suffered from this before Rito. What's especially horrific about it is that it didn't manifest until he came into contact with Lala, and some of the people he comes into contact with start to manifest it as well when they try to suppress their desires. Yami, Mikan, and Yui have started to "fall" in interesting ways with Yui "accidentally" giving Rito a blowjob in public. (Right in front of Nana and Risa.) Who knows how many unwitting carriers are out there.
The sight of Mikan sucking on Yami's breast may be yuri fan-appealing until you realize Mikan is only twelve.
Then again she most probably sucked on breasts at even younger age ... as a baby on her mother's.
If Rito is a sex beast in his sleep, does that mean he constantly molested Lala whenever she snuck into his bed? Does this mean Lala isn't as innocent as we first thought?
It has been shown that both A) her younger sisters both have very good understandings of adult related issues and B) Lala is very good at playing the clueless ditz. I will also point out some of her inventions seem to have rather sugestive uses. it does make you think.
For bonus points, you should ask: "Who taught his body/sub-conscious how to pleasure aliens in his sleep?" I have doubts that that sort of thing happens naturally or consistently.
Also, hopefully he only started doing this afterMikan stopped sleeping in his bed...
And it's probably better to think of it as Rito only actually molesting Lala once, then her... coming back for more. Also, Momo said that it only happened one in five times (before her "interventions"), and we haven't seen Lala pop up in his bed very recently, so it's very possible that she doesn't like it.
She certainly didn't like it when she barged in on Rito bathing, asking for a kiss and wound up crotch to face with him.
Chapter 66 confirms that nobody "taught" him how to molest girls in his sleep. Lala unknowingly infected/triggered a disease of presumably alien origin that manifests his subconscious desires when his conscious mind relaxes, and bends the laws of probability to make Rito a walking, unintentional sex god.
Chapter 73 of Darkness confirms that Lala does indeed enjoy it, as she snuck into Rito's bed after just coming out of the shower, hoping he would "respond" that way, bemoaning that it's been too long since the last time she did so.
Ghe Bree shapeshifts into a large hulking form, and then immediately backs down when Rito doesn't act intimidated. We learn that Ghe Bree's actually a weak species, with shapeshifting as their Schtick. If you think about it, it makes sense. Ghe Bree's species developed shapeshifting as a means of trying to ward off predatory species or mimicking them. If they had physical strength and prowess, they wouldn't need shapeshifting as their hat.
