Valentine’s Day

Here is a partial list of Valentine Day-related events happening around the Bay Area:

“Aphrodisiacs of the Tropics” Conservatory of Flowers in Golden Gate Park. For $35, you get a free drink, some chocolate and a docent lecture on how plants, for millions of years, have made more plants without having to ask each other out first.

“After Dark: Chocolate” Exploratorium science museum on the Embarcadero. For $20 you can find out about the DNA of the cocoa plant and then eat some of it, along with the rest of the chocolate samples being offered.

“Rope Burn” Men can learn the safe and sane way to tie up other men with ropes. Admittance to the bondage training session, held at Catalyst at 1060 Folsom St. at 7 p.m., is free, but donations are requested.

“Bridgewatch Angels” Golden Gate Bridge at 2 p.m. for Valentine’s Day training for volunteer patrol to prevent bridge suicides. Valentine’s Day, organizers say, is a time when the distraught often feel their losses most acutely. To sign up for the training, visit the Bridgewatch Angels page on Facebook.