I would ask who's telling the story, as in who's point of view is it from. I think that's critical, as in if she's telling it you could really get inside her head in any number of ways. Maybe she's a late bloomer, or looking to catch up on what she thinks she's been missing by being a good girl. Maybe she made a promise not to have "sex" and blow jobs don't count in her mind. Maybe she's just a horny teen like most of us were at one time, and being "forced" to do something makes it okay.
That one I can actually relate to, as in being forced to do something you want to maybe do anyway makes it okay, or at the very least not your fault. For me though, the BJ thing is giving without getting, if it doesn't go any farther, and one really has to be in a certain mood to do something like that... ten flipin times over.
Is this a personal dare to herself instead, as in can you actually blow ten guys in a row without throwing up? I kind of doubt it to be honest, but on this I have no frame of reference either. Was there a wager placed, as in "if you can tie me up so I can't escape you can rip my bikini off and make me blow all of you once."
The boy character sounds a bit creepy though, or is he hopelessly nerdy and virgin for life without resorting to such coercion? Has he had the hots for this girl and this is the strange way that manifested itself?
Finding ten guys of the right age in a little community might be a challenge too; how did they all get to that little oasis in the first place?
So many questions, I hope maybe this helps, Jackie.