It’s not intrinsically a problem. Lots of people can enjoy saucy photos, and even full-on porn and experience no negative effects on their relationships.

So is it a problem for you? That’ll vary from person to person. And only you can decide. If it is, know before hand where you draw the line. Any bikini pic or just sexualized ones? Is it just the liking or is the viewing a problem? What about porn? Remember to think about how you draw this line affects his life, banning him from seeing his sister’s beach vacation photos would be too much. Tell him you want to discuss y’all’s sexual media consumption and be ready for him to tell you what he’s not comfortable with you viewing either. And remember he can choose to walk away from the relationship over this, but that just means you’re not compatible.