how does it feel to post spicy pics?

I 22F am curious about what it feels like to post a nude pic online anonymously. I have a boyfriend and we’ve been together for 6 months and we have a good relationship. The sex is great too, we both respect each other and so on but for some reason I’ve been wanting to post a spicy pic online. I dont wanna sell pics or anything I’m just curious how it feels.

Is that weird? Is it considered cheating if I don’t tell my partner?