U might say is because she had a cold... but the truth is that she is constantly giving in even if her face and words are contrary. She could had simply told him to leave her room but the 1st thing she thought was about her pajamas and messy hair.
Is a bit weird tho. I get hes feeling deeply in love... but still seems like his reasons are superficial as per his M side of being badly treated and the refreshing behavior of a woman not giving in easily.
Either way, for someone that was so used to have plenty of woman around for yrs the only reason he wouldnt feel the lack of it is by being obsessed with something else.