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A couple of young gorillas have been captured in some pretty compromising positions in a zoo in the Netherlands.
Aybo and Thabo are young male gorillas put on quite a show for the viewing public and the cameras at Rotterdam Zoo the other day.
They were spotted getting into some pretty out-there positions that you might not expect, with one gorilla behind the other, as well as embracing one another in a variety of ways.
The slightly explicit looking shots were captured by zoo visitor and part-time gorilla voyeur Shirley Kroos and some of the faces that the young gorillas are pulling are pure comedy.
They seem to know that they've been caught, but they don't mind.
The pair are actually half-brothers and have the same father, which might seem gross at first, but there is a completely logical and innocent explanation for the whole thing.
You see, Aybo is only three years old and Thabo is three years old this week. They both have a long way to go (not to mention a lot to learn) before they reach the age where they can actually have a go for real.
Male gorillas usually reach their age of sexual maturity at between 11 and 13, females usually mature at about age 10.
This means that they are more likely than not just copying - or aping, if you will - behaviour that they have seen in older gorillas. These guys have got nearly a full decade before they are at that stage - you'd hope in that time they'll find someone who isn't related to them.
Until that time, it's just a perfectly innocent, and very funny, scene of some friendly primates having a bit of a laugh together.
Wildlife photographer Kroos, 30, said: "They were doing some adult things with each other playfully.
"Before and after they were running around with some toys they were given by the zookeepers. So they were just in a playful mood and enjoyed each other's company.
"It was great watching these two boys having fun together - they made me laugh and it was very unique capturing them on camera."
Gorillas, like a huge number of other species, often engage in homosexual behaviour - in fact, it's probably easier to list the types of animal that don't do it.
However, there's nothing sexual at all about what's happening in these photos, they're just too young
But 10 years from now, who knows?
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