Having sex is kind of awkward

Having sex is great and all, but it feels so vulnerable to show someone my body and be so close with them. And I feel shy to even make sounds or have an expression. Sometimes I wish I can feel more comfortable to do it more casually but it’s just really awkward to me even if I want to do it. Perhaps that’s a blessing in disguise though so that I can be more selective with who I experience it with. Does anyone else feel that way? I feel like people either have no problem doing it casually or they are just selective but not awkward about it.