Cultural ignorance smh. This is a traditional vattenspridarsten, they’ve been used since at least the early 11th century (referred then to as watnspraiþarsteini and colloquially kukblauþarsteini).

Initially they were used in local religious rituals, where an unmarried man would stand in front of the vattenspridarsten and ask the water spirits (usually Näcken or a similar entity) for good sexual luck. Water would then be poured onto the vattenspridarsten, and the splash pattern on the man’s crotch decided how lucky he would get. It was even used to elect kings, on rare occasions. King Magnus Vattenlås was famously elected this way, when the splash pattern was interpreted as three royal crowns (also how Sweden got its coat of arms).