Is it true that some guys don't like sexually fantasize a girl they really like? Is that even possible?

I thought all guys viewed their crush in a sexual light at some point or another.

basically my guy friend has a crush on another girl and he told me he never imagined her in that way.
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He said , "whenever I am about have sexual thoughts about her , I hit myself on the head and avoid it"

what he meant was he actively didn't try to visualize it but if it did accidently he avoided it.

wtf does that even mean
Is it true that some guys don't like sexually fantasize a girl they really like? Is that even possible?
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