<human>: Can you succinctly summarize the text in 1-3 sentences?

Be sure to explain in detail with line breaks.
Ok, so since I have more time, I've been thinking and I wanna ask you guys few questions. To what extent does a fangirl (noun) fangirl (verb)? And this is geared towards you fangirls for kpop and Free! and etc. You know, the manservices. ;)
(First, let me set some premises about myself. 
I have a girlfriend and she's a huge fangirl. I don't really care and in fact, I'll support her. So my intention isn't aggressive, just curious. )

What the hell is this guy saying? Well let me explain. So often times, when you see a shirtless Sehun or a shirtless Haru (from Free!), I notice a lot that the typical reaction is "oh those triceps," or "I'd so feel his arm."
I don't mind these comments, but how far are they supposed to go? Should you keep on going on about those fantasies even though you have a respective partner who you care about? 

And then that question brought me to another part. When a girl fangirls over a guys arms and abs to the point of wanted to feel it, would you feel it in reality if you could? Keep in mind that the scenario is that you've got a partner that you're dedicated to. 

Additionally, I was also wondering, what happens with a boy's respective fanboying. If the opposite partner were to fanboy about his idol's boobs saying that he'd feel it if he could, would that bother you as his girlfriend? 
Enlighten me here because I'm really just curious, but would you be offended? Personally, it seems like the same thing as a fangirl wanting to feel their idol's abs/arms. 

So yeah, tell me what you guys think~ Let's be nice about this cause they're only just questions. Lol.
<bot>: How far does a fangirl go when they're in a relationship, how far would you carry out those fantasies, and would you, as the girl be offended if the boy fanboyed the same way about his idol?