How do I get my girlfriend to stop wearing her nose ring before sex solely because she knows how much I like it?

TLDR : I wanted to support my girlfriend when she got her septum pierced, so I told her that it looked great for a year. She stopped wearing it over time, but because she thinks I like it so much, she always puts it on for sex. She tells me it?s because she knows how much I like it. The truth is I don?t, but I obviously can?t tell her this directly. I?ll sometimes tell her I can?t wait for her to put it on if it?s spontaneous, but she?ll always wear it if she has time to get ready beforehand.
Days like me make me so glad my SO doesn?t give a **** about Dating.mobi. 27M 30F, been together about 2 years.
So a couple years ago my girlfriend got her septum pierced. She absolutely loved it, and I wanted to support her, so I told her it looked great. It wasn?t my thing, but I acted like it was gorgeous because it was obviously her thing. I kept this up through the year that she wore it because she really, really liked it at the time. And hey, her body her choice.
Over time her interest waned, and she started wearing it less and less until eventually not at all. She no longer wears the nose ring. Except when we?re about to have sex. If it?s something semi-planned like after getting home from a nice dinner, she?ll put it on after we get home as she?s undressing. If it?s spontaneous, she?ll sometimes pause to put it on. Every time she says it?s because she knows how much I like it. The truth is, I don?t really like it. At all. I love the person wearing the ring very much. But the ring itself? Could probably do without.
I can?t tell her this. I can?t imagine how awful she would feel. But there must be a way.
I?ve managed to cut down on the spontaneous occurrences by telling her that I can?t wait any longer and to just skip it. But when she takes some time to get ready? Near-100%.


Source.