So So Missundaztood

Is my Spanish that bad? Or am I simply misunderstood?

I just asked a friend for un peso (a dollar) and after a later-to-be-understood-as-awkward silence passed, my friends shared with me that they thought that I asked for un beso (a kiss).

With the risk of sounding emo or nostalgic for P!nk...

Why am I so missundaztood?