Do our bodies like being warm to something?

So i was carpooling with my partners for selling yesterday. We were in the country so it was a 20 minute drive, then we had to head back to my city to pick up two other girls. This girl who sat by me wasn't skinny nor fat, just good lookin' with curves. Her body was warm... AND I FELL ASLEEP FOR A SEC? Like we were riding back to the office which is 20 minutes away. And I noticed that i fell asleep until she moved and i could still feel her warmth while she was talking to the others. (she's one of those sellers, she's good with good tips) So when I get in bed, it takes about 20 minutes for my body to get into sleep mode. So is this why we like to have someone to sleep with? (besides the sex part)

Do our bodies like being warm to something?
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