Anyone familiar with the term “side”?

I heard this term about a week ago on TikTok and I think it’s mainly used by the gay men community but basically a side as somebody who doesn’t enjoy penetration so like in the gay community, you could be a top, a bottom, or a side. I’m a cis woman attracted to mainly cis men and have never desired penetrative sex and I also have vaginismus so I literally can’t even physically have it. But I wondered if anyone else on the ace community would find this term helpful? I believe I’m a sex favorable ace, but only for a very limited number of sexual acts as other ones I am very adverse to. But our society widely defines sex as some form of penetration and I think it’s helpful for everyone to expand their definition so I wanted to share this term with you all. 😊