I believe it should be neither casual nor formal.
Plan it, but enjoy it.
Learn how to and use condoms, spermicides, and all that you can, if you're that afraid of pregnancy/a child.
You are attracted to whomever or whatever you are.(pedophilia is an exception, along with zoophilia, necrophillia, rape, infantophilia, hebephillia(Tweens) and ephebophilia(14-19 year olds). Those are exploitative.)
You will do whatever you and your partner consent to do during the course of the event.
A fantasy, roleplay, or fetish is fine:just don't let it override reality.
Don't overdo it, but don't avoid it.
Always be respectful.
Don't pay for it until it's legalized.
Bring whatever you need beforehand:don't expect your partner to be the supplier.
Don't judge other peoples' routines, as they will inevitably judge yours.
Don't break the law for sex or love.
If/when you orgasm and cum, you orgasm/cum.
Never listen to Religious, Republican, Parental, or Soccer Moms' opinion about it:find your own way.
Just because they live with their roommates, parents, grandparents or pets doesn't necessarily mean that they aren't adept or a virgin.
Ask about diseases before they happen, but don't ask for a full medical history.
Don't let your deal go down.
If it doesn't work, it's not gonna.
Make sure that you have at least 90% knowledge about your partner, and leave 10% of goodness to be discovered.
If they come out of the closet later, it doesn't necessarily mean that you're the same way.
Learn the codes and terminology beforehand.
Moderate in prepping your system: it could get messy.
Bring toiletries and a change of clothes:You'll need them.
No means no.
When your partner moans, open your eyes and look at her/him(to whom it applies). It might not be an orgasm.
Fakers gonna fake:if so, best not to return to there.
Talk dirty only if you 2 consent.
Viagra is not a toy.
Keep up to date with the latest neutrally-aligned sources of information about STDs, Birth Control, and sex in general.
Sex while genuinely sick is never a good idea.
Be prepared for backlash.
Bed =/= sex.
Don't be attracted to a person's sexual side; make it at least 51% core personality.
When one+one+more doesn't feel good, it will never be.
Help from a degree-holder or a clergy member=trying to cure anything but post-marital missionary position heterosexual sex.
It's not about babies or marriage unless religion and/or full-time commitment is important to the relationship.
have a good time, in a consensual way.