why don't guys like nipple piercings?!!

I've had my nipple pierced for about 1 year now and I absolutely love it. I was 17 when I decided to spontaneously just go for it and and don't regret it... BUT my bf doesn't like it! He never can explain why but he just doesn't like it. If we're being intimate then he knows that my pierced nipple is way more sensitive than the non-pierced one but he still won't go near it... why don't guys like nipple piercings?? Btw this is what mine looks like! Any suggestions what I could change the jewellery into for the first time changing it? Xxx [Photo Removed by Glow]