Guys, boyfriend suddenly wants more sex?

boyfriend and I have sex at least 4 times a month, we work insane hours at different times. All of a sudden he comes home and wakes me up for sex every night. His drive has skyrocketed. Talking with one of my bff about the amazing new drive she tell me it has to be because he is thinking about someone else because how quickly it changed is that true is that even a thing? I mean if it were true wouldn’t he just leave to go jump whoever else?
Guys, boyfriend suddenly wants more sex?
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