Atencio, I'm wondering whether this stuff is kind of 'overspill' from the excitement you have and the pleasure you give with your own cock? My guess, from your age, is that you're in that fab stage of getting a lot better at it with your girlfriend; loosing inhibitions, finding ways to satisfy her more fully. If that's what's going on with you, then of course you love cock! You love the very idea of cock! of erection, of penetration, of thrusting, of spurting cum. It's all so fab it gets out of hand in our heads!
Bi, gay, straight, these are all sliding scales and we find our place on them eventually, very few guys at absolutely one end or the other; very few.
My suggestion to you just now is this. Love your OWN cock. Like mine, it's probably not the biggest in the world nor does it last the longest. But it's the one you've got and the one that does amazing things in your girlfriend, yes? Enjoy it. Delight in it. Take pride in it. Eat and drink and live in such a way as to maximise its potential. And all those other cocks? My delight in them is a kind of male solidarity thing; part of the wiring in me that makes me a good lover? I think so.