If you don't want to neuter him I would just let her teach him it isn't okay. Dogs learn a lot from each other.
If your female isn't dominant enough to do so I would enlist a friend's dog who you know won't harm your male to give him a talking to. My lab mix gives pretty strong scoldings and has been used to teach dogs not to do things in the past. (she turns, snaps, then continues what she is doing, giving the other dog another chance to get it right/wrong, if they do it wrong she still only ever scolds, never harms. She's great)
You could also just try a firm NO.
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