You're getting hung up on the peas and not the underlying issue.
Imagine a food item you genuinely don't like, the people you're making a meal with know you don't like it because you expressly told them, and they go and dump said food item into the meal with a smile on their face and tell you to suck it up.
Hell, expand it beyond food, to just "hey I'm not comfortable with/do not enjoy this thing" and then the people who ostensibly like you enough to spend time with you, and thus should value your opinion, just go ahead and subject you to it and then treat it like it's no big deal.
Yes, it's being played as small potatoes here and it's for comedy purposes, but there is some merit in being a touch upset on Riko & Aika's behalf when they were unilaterally gainsaid like that.