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Studies show: The sperm quality of men is declining worldwide. Nicxtine, alcxhol, diet and medicxtion - but there are other risk factors. Would you have known that men should rather avoid things that are too hot? What could be nicer after a rainy, cold day than a hot bath, a trip to the sauna, or an intense ball massage from your girlfriend? And what kind of woman would I be if he trembles so much not to breathe a little warmth into him. Consequence: the testicular tissue d ies and the sperm thins out, because they simply can't cope with such heat.