Stories about animal rescues are also great. I once heard about a group that saved a litter of kittens from a flooded area. They took care of them until they were healthy and found new homes. These kinds of stories are heart - warming and positive.
This is a rather inappropriate topic, but in some works like 'One Hundred Years of Solitude' by Gabriel García Márquez, there are complex family relationships that might seem 'weird' in a non - sexual sense. For example, the Buendía family has a lot of strange family dynamics, like incestuous thoughts and unrequited love within the family which are used to show the cyclical and sometimes perverse nature of family history and human nature in general.
One example is the anglerfish. In some species of anglerfish, the male is much smaller than the female. When it's time to mate, the male bites onto the female and eventually fuses with her body, becoming a sort of parasitic mate. Another is the bonobo. These primates are known for their rather open and complex sexual behaviors. They use sex not just for reproduction but also for social bonding, conflict resolution, etc.
In Greek mythology, the story of Zeus and Leda is quite strange. Zeus transformed into a swan to seduce Leda. This form of transformation for the purpose of sexual encounter is really odd. It shows how the ancient Greeks had some very different concepts of how the gods interacted sexually with mortals.
I'm not really sure as I haven't read them all. But some might involve strange first - time experiences, like having a date in a really unusual location that led to an unexpected romantic encounter.
Unconventional settings can make a gay romance novel 'weird'. For example, if it's set in a post - apocalyptic world where the rules of society are completely different and the relationship has to develop within those strange new rules. Another factor could be the characters themselves. If they have very unique personalities or abilities that are not commonly found in typical romance characters, like one character being able to see the future and how that affects their relationship.
Yes, they can be. For example, they can provide guidance on sexual health, like promoting safe sex. This is really important in preventing sexually transmitted infections.
Another example could be from 'Eyes Wide Shut'. The masked orgy scene is very strange. It's a mysterious and somewhat disturbing look into a world of hidden sexual desires and the seedy underbelly of what could be considered an elite's sexual escapades. It makes the viewers question the hidden and not - so - normal aspects of sexual behavior in a certain social strata.