Can I watch you?
Yes, you can watch me your watch.
No, I mean can I WATCH you?
I don't get it. 😑 *facepalm*.
OOOOOOH YOU MEAN WATCH WITH YOUR EYES! YES!
Listen up, buttercup. This ain't rocket science. The joke plays on the double meaning of "watch." The first dude thinks the other dude wants to peep at him, but really, he just wants to borrow his timepiece. You probably thought the same thing as the first dude, ya perv.