Here's a checklist of things to ask a girl before sex:
1. You're 18, right? (The correct answer is YES)
2. When was the last time you washed your genitalia? (you may want to take this opportunity to ask about her rear end as well if you plan on using it)
3. Any burning sensation when you pee? (do you really need this explained)
4. Would you mind taking your panties off so I can make sure you don't have gooey bumps on your wee wee? (if she refuses then you're not getting any, period)
5. Are you trying to get pregnant? (The correct answer is NO)
(optional) 6. How long until your husband/boyfriend gets home? (anything less than 1hr can be viewed as an excuse to skip foreplay)
If you didn't sense my very subtle sarcasm then you should probably not be trying to mate.
There. Now go have sex and stop thinking so much
.