June 9th is the day in which couples (gay or straight) celebrate sex by having sex. The reason National Sex Day is on June 9th is because 6/9 closely resembles the popular sex position 69.
After a year of social distancing, National Sex Day marks a return to embracing life. Making whoopee day was pretty much called off last year due to the pandemic.

Get a room on Wednesday: It’s (supposedly) National Sex Day. The day of love, June 9, is back this year (on some calendars) for post-pandemic celebration.
