This Globe and Mail coverage of a University of Waterloo study says researchers “have scientifically determined the best sexual positions to prevent spinal muscles from seizing up at an inopportune moment”.
Check out the link:
This Globe and Mail coverage of a University of Waterloo study says researchers “have scientifically determined the best sexual positions to prevent spinal muscles from seizing up at an inopportune moment”.
Check out the link:
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