app Clue, settles long-held theories around seasonal spikes and slumps in sexy times, showing that while most holidays result in more erotic activity among women, there is a steep dirty-deed dropoff in the three days leading up to December 25. Alas, the one gift you’re unlikely to find under the Christmas tree: good sex.The stress-inducing lack of leisure time — between holiday shopping, cooking and stuffing faces — would explain the stymie in the sheets, according to Dr.