Your default state is a huge, muscular, bullish monster (has nothing to do with animals). Big and beefy, crazy high testosterone. Easy to lift huge, heavy items. Cock and balls swelling and huge. Growing bigger and bigger all the time. But whenever you, or someone else puts a collar on you, you immediately deflate, becoming tiny and thin, with tiny little cock and balls. You feel submissive and obedient, weak and small. Once the collar comes off, you go back to becoming huge and strong again.