I can understand the anxiety that your placid demeanor can create in your partner during sex (Is he enjoying himself? Am I doing something wrong?). The question is, what do you feel emotionally during coitus? Is it enjoyable? Do you get a sense of intimacy? If yes, then you're most likely not abnormal. Try vocalizing the pleasure you're experiencing to reassure your partner, make frequent eye contact, carress even more frequently and talk about how good it was afterwards. The fact that you cuddle up after sex is a plus in my book.

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Nubian