I'm certainly willing to concede that Sweden's feminist definition of "rape" is bullshit.
In some of these cases, foreign-born men, coming from a "male-dominated" culture, act according to their customs when it comes to pursuing a woman of interest, and this leads to a cultural conflict where the man ends up accused of rape even without doing anything overly physical, merely because of what was implied and the resulting hysteria on the part of Swedish women, who have been brought up to despise masculine traits.
However, I still don't think this quite explains the high number of sexual assaults. The truth is that if Sweden was Swedish, we would probably be talking about a very, very low number of sexual assaults taking place there, under any definition of rape. It's not like Sweden's surrounding countries are somehow less feminist. If Sweden is feminist country #1a, then Finland and Norway are feminist countries #1b and #1c.
The reason they see fewer sexual assaults (until perhaps, recent times), is because the number of foreign-born, or people with foreign backgrounds, are much fewer, because Finland or Norway haven't quite jumped on the "multi-cultural" boat as of yet. The recent surge in sexual assaults in these countries, has already proven that there's a very unhealthy phenomenon associated with taking all of these refugees from the Middle East. Forget Sweden, just look up the statistics in about every other country post-refugee crisis, where the records are actually being kept properly, and the ethnic backgrounds of the perpetrators reported.