I'll show you a Titan

Eren Jaeger is just a sixteen year old boy: he listens to music, gets awkward boners and isn't popular at school.
Levi Ackerman is another sixteen year old boy: he has piercings, doesn't give a shit and is renowned for being great at sex.
Little did they know that, when put together, they could create an earthquake: one powerful enough to be mistaken for a titan.