For the fixes in March it states:
(UPDATE REMOVED - Giving people month warning on this one or may keep it out!) You can only extract semen from studs of appropriate age now. Age Bonuses do not apply to this.
I know there was a vote about this but I can't find it now. Does anyone know if we can still extract semen at 33 or has it now changed? I don't want to extract the semen unless I have to.