Wear cotton undies.
Do not have sex with someone because they tell you you should, have sex with them because you like them and you feel comfortable about it.
Do not have sex anywhere others may see you, walk in or film you on their phone.
Never send nude photos of yourself via text or email, and if you MUST .. CHECK the address BEFORE you hit send. Your boss and your mother REALLY dont want to get that message.
Never make a sex video with someone unless you get back all the copies if you break-up. ALL the copies.
Write love letters by hand.