Are some people just naturally tighter/looser than others down there?

[Teox]

A few things can help you relax more. First cum right before you try, second lots of lube and a very think object such as urethral sounds. Move it in a small circle until it feels comfortable, then get something a bit bigger, keep at it until you get a finger in comfortably every day for a week, then go for two fingers, then three and on to your plug.

You're training those muscles to relax and not clamp down when something is in there and, it takes longer, and smaller starts for some than others. If you never get there, don't sweat it, not everyone even likes anal and, being gay certainly doesn't mean you have to like or even do anal.

Thanks Blue for your advice but you still have not answered my question. Are some people just naturally tighter/looser than others down there? then?

I have tried all what you said.