My boyfriend has been coming quicker than usual during sex?

I've been with the same guy for almsot a year. We have a lot of sex, and usually I have to practically beg him to come (he lasts 45 minutes plus!). Lately he's been coming a lot quicker 10-15 minutes). Just wondering what the reason could be for this. Is he getting even hotter for me or trying to get it over with lol.
My boyfriend has been coming quicker than usual during sex?
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