You figure since it said 'SUCK ME' it'd be less weird to suck it. Besides, you're supposed to suck popsicles anyway. Even if this one looks weird, there must be a reason they told you to, right?
You put it between your lips and suck. The taste is a really weird mix- it does taste cool and icy, naturally, but it also tastes sort of salty, and warm, almost fleshy. You want to hope the saltiness is because it's a flavour like salted caramel or peanut butter, but something tells you it isn't that simple. Fortunately, it's definitely nice enough that you want to suck and suck.
Something you soon notice is that your body seems to be heating up. You let go of the popsicle stick and hold it in your mouth, and remove your shirt. That doesn't feel like enough, and you remove your jeans too. Looking around to remind yourself you're alone, you pull off your boxers, and kneel down, naked and sucking on the popsicle. You notice you have a rock-hard erection, and not only do you not want to stop, you feel like you can't. This just feels too good and too weird.
A weird fluid seems to leak from the tip of the popsicle onto your tongue. It tastes saltier and still than the popsicle itself, but you like it even more and want to taste more of it, sucking more eagerly as you rub your cock.
Just after that, something starts to change...