Absolutely normal and ok to not be into penetrative sex. Google 'gay side' and there are a variety of articles.
Side: describes someone who does not practice anal sex and therefore does not define himself as top, bottom or versatile.
According to Urban Dictionary, a side is "a homosexual male who does not enjoy anal penetration (giving or receiving), but will engage in other forms of same sex activity (fellatio, frottage, mutual masturbation, etc)."
https://www.theguardian.com/technology/2022/jun/20/rise-of-the-sides-how-grindr-finally-recognized-gay-men-who-arent-tops-or-bott
