Milke, SSBD, RATS, TMNTPDanny says Relax. You don’t understand how reproduction or STD transmission work? You don’t feel emotionally ready? You have religious or moral convictions that do not permit you to be sexually active at the time? You feel like you need some sort of committment from your partner? Have some other doubt or issue? Then abstaining is clearly the way to go. I certainly don’t advocate doing anything that you don’t feel comfortable doing.