Steve Harrington who always hope he's been doing a good job in never giving anyone ideas that he may be the slightest bit ticklish, putting out his best tough exterior act and ignores Robin's occasional remarks on how stupid it makes him look. One really good poke or accidental skitter to his ribs; it's over for the man. When Robin's around, there won't be any need for that. She'll just straight up tell you about Steve's ridiculous ticklishness like it's a favorite fun fact of hers.
Steve Harrington who hates his tickle laugh with a burning passion, but too bad for him because his friends absolutely adore it so he's most of the time on edge around them. His tickle laugh is 100% waayyyyy different than a laugh he does whenever someone tells a good joke, so high-pitched it easily embarrasses him and sends a flush to his cheeks. Steve cackles more than anything though when being tickled, and it never fails to have whoever is tickling him to laugh alongside with him because of it.
Steve Harrington who snorts when the tickling goes on for more than three minutes, or of course when you start to target his hips. If you go there, it's best to make sure you're already holding on or he WILL buck you off and not say sorry for it, talking about how you deserved it.
Steve Harrington who is pretty easy to overpower when getting into a tickle fight, something he definitely does not ever want to talk about. When he was dating Nancy, bless him, was only trying to be a cute boyfriend and get her to giggle here and there to tease, but Nancy quickly turned those tables around each time and soon enough Steve was doing all the giggling and pleading. Tickle fights with Robin, however? He doesn't even try. She always has the upper hand, going straight for the kill on his worst spots and tickling him in such a way it has him emit funny weird sounds through his laughter he's never ever heard before. It's not like he starts them anyways, it's most of the time her. But how can you blame Robin, when her best friend's reactions are just so priceless???
Steve Harrington who never fails to give quick pokes or a skitter to his friends' sides if they ever catch an attitude with him, and those who fall victim to this most of the time is either Dustin or Robin, I mean duh. With Dustin it usually escalates to more than just that, because man does that boy don't know when to stop pushing his best friend's buttons. I see Steve only tickling his friends if they ever were to be a pest, not just because he felt like it. For how ticklish he is, it'd be a big mistake on Steve's part to start a tickle fight that he very much cannot finish.
Steve Harrington who when punishing you with tickles, will make you apologize but all the while still tickling you to pieces. Nope, he won't stop. No, he doesn't care if you can't get the words out because you keep laughing so much. Just try harder. So kind of him, right? He also teases by stating the obvious a lot, knowing damn well you can't reply back. "Jesus, this must badly tickle, huh?" "What do you mean you can't? Oh, I'm sorry, is it because you want me to stop? Hmmm, I don't know." "Was that a snort? You snorted because I tickled you riiight here, correct? Or was it this spot?"