When was the first dildo invented and what was it originally used for?

I've seen the recommendations. I've seen the suggestions for do-it-yourself workaround (cutting open a condom, plastic wrap... ). What I *haven't* seen is practical usage advice — how to place the thing effectively, how to overcome the limitations of losing direct contact, how to arrange things to permit vaginal penetration with fingers while still maintaining protection and so on. Best-practice condom use isn't perfectly obvious either, but at the most basic level it's pretty straightforward. If you want to build acceptance for barrier use during cunnilingus, it needs to be at least as clear and/or at least as well-documented.

Dear Alice,

I recently had a routine HIV screening done for prenatal labs. It was positive. Thank GOD, western blot came out to be negative. My OB is reassuring me not to worry, that false positives sometimes come out in pregnancy, and as long as the western blot is negative — I'm negative. Could you explain a little more in detail as to why and if you agree with my doctor? I'm at very little risk otherwise and had a negative HIV test about five years ago and am with the same person (my husband).

When I masturbate, I can never achieve orgasm. I've never had an orgasm and I think I am not concentrating enough. After a while, it just gets annoying down there and I give up. Any tips on how I can concentrate more or what I should think about?

1) I like to kiss my wife's feet. Do I have a foot fetish?

2) I get sexually aroused by feet. Am I a freak, or what?

3) I have two questions:

1. It's getting to be summer over here; I don't know if that's part of it, but why do so many people wear sneakers or sports shoes without socks? Is it a new style or something?

2. Does it mean I have a foot fetish if I get a "hard on" when I see other guys not wearing socks? I mean, I've seen the foot fetish web pages and I have no reaction to them (basically the same reaction as if I were reading a VCR manual). And, occasionally, I do get a really big "woody" when I go out in public barefoot in my high-top sneakers or see other people do it.