Anything over about 26C outside and I start overheating. After a few hot days, depending on the construction of your house, its very fabric heats right up like a Dutch oven and even if the nights are cool, it radiates the stored heat back out constantly
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I have ceiling fans in my living room and bedroom. They don't cool the air of course but the air simply moving over your skin has a slight cooling effect.
During the day, fanlights open (if safe) and curtains/blinds closed. Then around 9pm open all the upstairs windows wide for the two to three hours before you go to bed.
If you're really suffering then putting your feet in a bowl of cold water will cool you down (blood vessels are close to the skin and draw body heat away). Similarly, rinsing your hands under a cold tap will help. Cool, damp flannel on head. Young woman between your knees, sucking you off, all these things will help cool you down
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