There are some compliments men should never offer up to women. "I really like your leggings" for instance. If it's a woman that says it to another woman-"Oh! Thank you! They're XYZ Designer"
from a man standing behind you in the grocery store that you realize has been watching your ass the entire time you take stuff out of the cart- "Thanks"...... raising an eyebrow and making sure the cart stays between him and you.