Fingering husbands butt

Hey girls

So my husband and i have decided we’d try something new... do any of y’all have experience with sticking your finger in your mans butt? I know it’s weird LOL. But he’s kind of freaking out about it. He’s obviously never had anything up there 😂 or has ever wanted that. But I’m talking him into it. How do your men react?

Side note; my husband is 150% STRAIGHT.