I admit I feel like during sex I make the most ugliest face expressions

I mean my boyfriend is not ashamed about it he never said anything but you know how some girls be lookin hot with their mouth all wide open an the closing eyes, all that extra shit etc you know lol but to me I just feel like my face looks like I have to go to the bathroom and take a huge crap that is why I cover it half way with a pillow sometimes lol