I was reading the new issue of Mother Jones which arrived today...and I just had to comment on this!
Free Teens USA is an organization that calls itself a 'reality-based, abstinence-centered' program for teaching teens about sex. And one of their recommended activities when working with students is to have them spit into a cup, trade cups with another student, and then drink. Students are then told that sex is more intimate than drinking someone else's spit.
Okay. Maybe. Maybe it is more intimate. But if you're doing it right, it is also quite a bit better!