The core premise on which I'm basing this project is that the risk of specific acts in specific scenarios can be determined through scientific studies. Many acts and scenarios have been studied already. From those studies we can deduce the relative risk of each factor (http://ww2.aegis.com/files/AskDoc_r
What I'd like to present to the user is a form. My first draft of the form is something like this (including bisexuals is difficult. including the transgendered is impossible for lack of data):
Your age: Your expected life span: Your sex: M/F Your partner(s) sex: M/F/Both Your continent or country (for looking up average infection rates): Your acceptable life-long risk of contracting... A) incurable fatal STDs (HIV): ____% B) curable fatal STDs (syphilis): ____% C) incurable nonfatal STDs (HSV): ____% D) curable nonfatal STDs (gonhorrea): ____% How often do you have intimate contact with your partner(s)? ___ times per year Have your partner(s) tested negative for [_] A, [_] B, [_]C, [_]D? Have your partner(s) tested positive for [_] A, [_] B, [_]C, [_]D? What acts do you perform regularly with your partner(s)? Condom? Yes No Give Oral Sex ___ ___ Receive Oral Sex ___ ___ Vaginal Sex ___ ___ Give Anal Sex ___ ___ Receive Anal Sex ___ ___ How often do your partner(s) have intimate contact with other partner(s)? ___ times per year Have your partner(s)' partner(s) tested negative for [_] A, [_] B, [_]C, [_]D? Have your partner(s)' partner(s) tested positive for [_] A, [_] B, [_]C, [_]D? What acts do your partner(s) perform regularly with their other partner(s)? Condom? Yes No Give Oral Sex ___ ___ Receive Oral Sex ___ ___ Vaginal Sex ___ ___ Give Anal Sex ___ ___ Receive Anal Sex ___ ___
So, after you fill out the risk and frequency sections near the top, parts of the bottom would immediately grey out, indicating those things are completely incompatible with your desired risk. Maybe your partners need to always use a condom, or only have other partners who have tested negative. Maybe YOU need to always use a condom. Or maybe you put entirely unrealistic numbers in at the top (sex 10 times a day for 60 years and you want a 0% chance of contracting HSV? not gonna happen) and the entire bottom section will grey out.
One goal of this project is those occasions. If the greying out step disables acts you want to perform, then you would be led to some helpful information on risk profiles. If you really want to have unprotected vaginal intercourse, even with just your monogamous partner who is regularly tested, you MUST accept that there is a >0% chance of contracting some STI over the course of your next 30 years of active sex life (around .005% for HIV, actually). Getting people to think about this risk in realistic numbers will qualify as a success here. I, personally, before doing this research, couldn't have said if 0.1% or 0.0001% was closer to accurate for that scenario, and that's a huge difference.
Once you've seen how the chart greys out, then you'll have the option to continue. You will be able to enter a mode where you can check off all of the things that you want to do, and see what your partner can still be allowed to do. Simply put, for some combination of settings, if you don't use a condom with your partner then they have to use one with theirs, but if you do use a condom then they can go without with their other partners. Or, if you know the testing status of all your partners' partners, then you or they can forgo the condoms. Or some other combination of risk factors. Alternately, you can check off all the things you want in both bottom sections and see what happens to the calculated risk profile relative to the risk you input at the beginning.
Every piece of the form would have some way to link to the source of the information. I'd have to draw from dozens or hundreds of studies and papers to get all of the relevant data.
I'd appreciate feedback on how you might want to see this work differently. What other data should I use in the calculations? How should I present the results? Would you find this useful?