Should I be flattered or creeped out?

Some old guy came to my work today

He looked a bit strange but I gave him my usual great customer service

However, he started with the compliments”you’re so beautiful”

And I said thank you

Then he started with the pick up lines and I just laughed

But then he was “uggggh can I be your dog in my next after life...please?”

Wtf

What the weird part is that I look very young

People tend to think I’m 16