Wheeler's confession and kidnapping

I've got many,MANY issues with this stupid,unbelievable movie. Help me here. When Wheeler gets beat up in the school yard, and starts screeching (MADLY annoying) about having their own sex slave and not needing Johnny's girlfriend, whyyyyyyyy would Johnny then turn around and kidnap him?? Was it really so hard to believe that Wheeler and company had some submissive chick that they were all banging?? And beyond that How in the hell did he manage to get both Ricky and Wheeler into the trunk to prove that they had this unbelievable sex-slave?? Threatening them at bat-point? Threatening to slug them with their fists??? Broken ideas like those are why I thought this movie was a P.o.S. And the BJ scene. The idea that Johnny the bully was GOADED into taking a bj from an abused-looking stranger (maybe with herpes or worse)is laughable. Even in a science fiction/horror film aren't we supposed to think "Hey, I could see that happening"?