Tennessee lawmakers added language to the state's abstinence-only sex education curriculum that warns against "gateway sexual activity."Although Senate Bill 3310 does not specifically define what "gateway sexual activity" comprises, many have interpreted the phrase to include discouragement of anything that has potential to lead to sex -- including kissing, hand-holding and cuddling.The bill is a response to recent controversies over sex-ed lessons in some Tennessee school districts that mentioned alternatives to sexual intercourse, according to The Tennessean.