Thank you for your query at AskTheDoctor.com
I understand your concern.
He is probably manifesting an allergic response to the vaginal fluids or the latex if he is wearing a condom.
Have you changed any soap/ chemical to clean your genital area recently?
If so, he may be reacting to it.
I will advise a few days of abstinence and you can resume sex after a week's time. If he still develops the hot feeling, he can take Tab. Claritin 10 mg once at bedtime.
Hope this was helpful,
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