From my reading the chances of them being sexual are very slim indead and as has been stated not when they are hard. I just wiggle it around and do try to get it out without breaking but I have had them break on me before without getting an invasion of bubbles showing up somewhere down the road. I probably take about 4 or 5 a month out of my large tank. I posted a link to some additional information on this a few months ago and will try and find it again.
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