I agree with justthefriend, but when I'm actually DONE done I usually let her decide. I usually try to cuddle for a bit unless she doesn't want to and pushes me away, and if she just lays there staring at the ceiling I do the same. Some girls just like to lay there and enjoy winding down in complete silence, and if she wants to talk I let her initiate it and actively participate to let her know that I'm interested in talking to her, rather than simply answering her questions like most guys do.
Honestly, this is just kinda the extremely short abridged version. I can't list every possible scenario, there are just too many and it's really just one of those things where you have to feel it out. For me, her body language tells me when she wants to be held, talk, or just go to sleep.
Actually, on a side note, don't blame your man if he is just too tired to talk or cuddle for an extended period of time after sex. I read an article about hormone release during sex and it stated that the chemical changes cause completely different responses in men and women. For women, after orgasm they get a rush of adrenaline, and naturally feel more awake and aware that is if they have the energy to facilitate it (I imagine the physical act can be so exerting that it would make you tired by the end). For men though, I forget what chemical causes it, but it actually influences exhaustion and desire to sleep.
When we cuddle with you girls, we just used a lot of energy to engage in the physical act, this hormone is introduced into our system making us tired, and we're hot so our metabolism continues to burn calories at a rapid rate. The addition of your body heat keeps our body hot and in this rapid metabolic state, and by not cooling down continues to burn calories. Eventually, we just don't have the physical energy to keep our eyes open.
If you're interested on why men fall asleep after sex I suggest you look at these, they're relatively short and insightful. I can't find the exact article I read, but it seems it wasn't just one chemical, but a whole slew of them that induce sleepiness.
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