How old are you? I might sound like an old fogey on this, but I don't think you should be having sex if:
a. You're not in love with the person and
b. You're under the age of 18.
You should at least be in love with the dude; just don't have random sex! I'm not saying you will, but you didn't provide a lot of information...
But nah, your mom won't be able to tell...