Eager to get a good view, Ty runs over to the Tiger exhibit. His thoughts fill with gleeful images of his classmates jumping the fence and doing the nasty in front of all the giggling girls. He feels a perma-grin coming on when he gets to the Tiger den.
There's only one tiger in there, and Ty frowns. He can't tell if it's a male or female.
He feels something stir in his pants, and a sudden pressure. He shakes his head. Something's wrong. Ty looks at his pants and sees the odd bulge. A little fact rings around in the back of his mind "one of the boys in my class... " But before the thought can fully form, he brings his eyes back up to the tiger.
It's right on the other side of the glass, looking at him. "I ... I gotta find out if that's a guy or girl tiger..." he mutters, his body moving toward the staff's entrance. He quickly wishes it was unlocked and goes through.
Now in private, he unzips his pants and his tighty whiteies are tented. He stares a moment, and dimly realizes he wants to use it.
"No, wait - that's not right. I meant - uhh..." but he also has another thought "an uncontrollable urge"