Everything you could possibly say becomes inherently creepier when whispered slowly.
Case A: You compliment a female stranger "I like your dress".. Innocent enough; You whisper to a female stranger "I like your dress".. Instant pepper spray.
Case B: Your kid's elementary teacher happens to be a guy. He says "I've always loved children" .. Nothing wrong with that; He slowly whispers "I've always loved children".. SOMEBODY CALL THE POLICE!
The lesson here: NEVER slowly whisper.