I would dislike it too.
I used to be in couple with several women, but I only lived with two ones. First one acted a nice way, like going to sleep together, and I often did it wrong because of video games while I should have been with her. Second one was selfish as #### and we rarely went to sleep together. I didn't trust her because of several things including this. Why a woman doesn't try to fall asleep with you, and what is she doing while you're sleeping ? Utopian thing would be both going to sleep together, having sex every day and then sleep. Because lack of sex while you're in couple could lead you to being suspicious too. How to trust someone who doesn't come with you in your bedroom and with who you're having very rarely, and not good for both, sex ?
I think a woman got to be several things, a friend of course, a lover both mentally and physically. Also it would be very hard to trust selfish women as it's also a trait of a lot of people who are cheating. Some people could cheat because they're fragile and confess about it later, regretting, but selfish people clearly don't give a #### and could even deny it when you come to them with this idea
Don't trust selfish women. Also I knew a girl a long time ago, I found her suspect because she was on the computer discussing with someone, and later she cheated on me and confess it to me. So sometimes we just got to follow our instinct, even if we got no evidences, because some let no evidences...
Don't accept "new women", find old standards, a one who trully loves you
Of course it's digressing and doesn't mean what I lived is true for others, but I couldn't support this behaviour again, even if she does nothing wrong
EDIT : I could even add the selfish one instantly made me think to the one that cheated me long time before her, which means : instinct, again
Something in the eyes...