Aside from the other examples given I suppose (listed in no particular order, numbers not related to importance of reason) 1. Social movements promoting not ha

Aside from the other examples given I suppose (listed in no particular order, numbers not related to importance of reason) 1. Social movements promoting not having sex. Obviously not that big a thing but it does cut down the available sex partners. 2. reiterating the examples people give of animosity between male and female, straight sex still the bulk of sex and does seem to be a lot more reasons for avoiding each other nowadays. 3. neurodivergence becoming more acceptable, many neurodivergent people have lesser sex drives, in the past you might have just decided to go ahead and have sex because oh well it's what one does isn't it. 4. sex is going down in comparison to previous decades which might have been especially high sex decades. Perhaps the sexual revolution was revolutionary but now it is somewhat old hat and not as interesting.