General:
If a character can meaningfully consent, Jaskier will fuck them. He is excessively horny on main and has absolutely no fucking standards! He's vers, into a lot of shit, and has absolutely no rights.
D/s:
Jaskier is most interested in femdoms, on account of he finds Yennefer equally annoying and attractive. In general, he defaults to submissive but he can be coaxed into a more dominant role.
Danger:
Mark him down as scared and horny! This one is kind of hard to quantify, but essentially if a situation is dangerous in some way then Jaskier will immediately be horny about it. It's just how he's built.
Double Penetration:
Either 1 or 2 holes is fine from Jaskier's perspective on account of he's a size queen. Spitroast the bard! Doesn't even need to be in the context of a threesome, toys and magic being involved are a-ok too.
Breathplay:
So, uh. Fair warning? This one is a maladaptive coping mechanism and his narration about the situation is likely to reflect that/his experiences in S1E05. He does enjoy it though.
Breeding:
While Jaskier enjoys dirty talk related to breeding, that's where his enjoyment ends. He is not a fan of the actual... being pregnant part? Or children in general, Ciri excepted.
Cucking:
It's canonical. I'm sorry, but the man is canonically into sleeping with other people's wives. He could be sleeping with anyone and he's choosing married women. Mostly he likes to be the bull, but can play other roles.
Objectification (receiving):
If Jaskier is comfortable with someone, he doesn't mind being treated like an object. Yeah, he'll be your footstool. It's not really a first hookup thing for him though.
CBT/Ballbusting:
Jaskier not much of a sadist, so he definitely has to be convinced into giving. He's also quite fond of his bits, so it might take some IC finangling to get him to agree to this one.
Humiliation:
Jaskier is fine with a certain amount of humiliation from people he trusts and it isn't very personal. Like yeah, sure, call her a slut. He is more willing to dish out burns though.
Daddy Kink:
Are you playing Vesemir? Yes. For every other character, uh. Honestly, Jaskier doesn't really understand? The appeal? In modern aus, this one is easier though.
Mpreg/Eggpreg:
ICly, Jaskier would hate it. He thinks babies are parasites. On an OOC level I just hate... graphic birth scenes. It's easier with eggpreg, but in general I prefer to skip birth entirely and do the other parts.
Vore:
On an OOC level, I prefer soft vore to hard vore. This is also definitely a thing I prefer to plan beforehand so please contact me about it if it's a thing? It's just something that needs some set-up.
Ageplay:
Please note the ABDL in the hard limits section. I'm fine with ageplay, but I prefer to keep it in the Middle range rather than the infant range. I also have zero interest in diapers.
Watersports:
Jaskier is more interested in it as a form of degredation than, like, the omorashi end of things. He likes being degraded, actually! It's very much a thing he only likes from people he trusts, however.
Bloodplay:
Sexy vampire feeding? Yeah. Period sex? Maybe. Knifeplay that involves blood? Possibly! Basically this is one you should definitely ask about so we can plot slightly beforehand about it.
Weight Gain/Inflation:
Thiiiiiiis one is oocly difficult, because I formerly had an eating disorder! It's not impossible, it just needs a lot of ooc communication before it happens. Inflation is easier, but the whole category is iffy.
Gore:
The player loves it. The character... it's kind of contextual? In the context of monsterfucking, he's more into it. Outside that he's, like, kind of disinterested. Basically there just needs to be some ooc plotting.
Dubcon/CNC:
For dubcon, I personally prefer that it's on the aphro/alcohol end of things, but enthusiastic. Jaskier has... opinions on aphro, though, so this one might have negative CR consequences.