I like to think Floyd had been a slut for years due to reproductive instincts going into overdrive to encourage repopulation as a result of coming back to a dead Troll Tree and assuming his entire tribe got eaten.
(I suggest tagging this as "trollsnsfw" so minors and those uncomfortable with nsfw will block that tag and be able to avoid it.)
Lol, I like the emphasis on Floyd being a slut for this XD
And while I usually view topics like this in a more analytical light and less of actual nsfw, I see what you mean and that's probably a good idea, so I'll do that
If we wanna talk about reproduction and why animals feel the drive the begin mating, I'll talk about what actually triggers animals to begin reproductive cycles and why.
They're not going to be like humans, where we can pretty much do it whenever we like, and because we can do it whenever, women menstruate monthly to keep the uterus constantly prepared.
Lots of animals rely on environmental cues and resource availability to trigger their heats, and I wouldn't be surprised if Bergens 100% took advantage of this.
1. Daylight hours
Extended or decreased daylight can indicate optimal chances of offspring survival. Either because its indicating the end of fall or the beginning of spring, and if an animal has a long pregnancy, they may choose to mate late fall and be pregnant during the winter so the offspring is birthed in spring. Alternatively, if they have a short pregnancy, than the beginning of spring is great as everything will be warm and grown and ready when the offspring arrives.
2. Temperatures/Weather
Can be tied to the first reason, as temperatures and weather often indicate which season is approaching.
3. Food Availability
Also tied to the first two, whether there's even enough food to handle is a big indicator for animals. If lots of animals share similar mating instincts, then this can either be good (lots of foods available) or bad (viewed in nature as the food).
Besides environments, lots of social and behavior cues can also indicate reproductive instincts. The availability of a mate, hormones and territories, courtships, and even just feeling safe.
Being captured by Bergens probably screwed over the [pop] trolls' instincts like crazy. Suddenly being captured and confined within a limited space, all living under one tree, constantly under surveillance and not knowing when the next feeding will be... that's a lot of stress for a little guy.
And if we want to keep believing that early Bergens (before the first movie) were downright HORRIBLE, then maybe they did some things to mimic those environmental cues to trigger more troll population just to line up with Trollstice, OR...
Maybe Chef just circled the tree and sprayed them with a substance to forcefully trigger those instincts.
As for Floyd (or maybe even John Dory, since he canonically also went back to a dead troll tree), the sudden sight of an empty, dead tree with no signs of living life would be absolutely crushing. Zero mates, zero community, zero food supply, and habitat dangerously uninhabitable.
Leaving that and suddenly taking refuge in another genre's territory?
Lots of mates...
Lots of food...
Lots of protection...
Lots of structure and stability...
Yeah. I would believe those instincts went haywire.
Bruce clearly got busy, so why not anyone else?
And I think Branch would be a wonderful depiction of a troll who's experienced zero hormonal influence, considering his constant desire to feel safe.