If it’s about a system or a part of the human body and how they work, you’ll find it here. Anatomy, body function and whole systems explainers – about all kinds of bodies, and usually presented through a gender-neutral lens – myth and misnomer debunking, help navigating sexual, reproductive and other physical healthcare: it’s all in here.
Bodies

Highlighted content
My boyfriend and I were making out, and I decided I wanted to go further and have oral sex with him. We discussed it before I did it and we both agreed it was the right time. As I was about to do it...
The Great Arousal Mismatch: When Bodies and Brains Don't Line Up
- Heather Corinna
Articles and Advice in this area:
- Heather Corinna
I just want to start by debunking something first, okay? There really is no distinction to be made between “some” intercourse and “full” intercourse. In other words, an inch or so in, is as much of intercourse as a few more. Given how much penis sizes can vary, as well as the fact that the nerve…
- Heather Corinna
Just so you know, while certainly, it’s more common to begin some sexual activity before your age (which you had), there still are plenty of people who have not had sexual intercourse at your age. And given that the age of first marriage has been increasing, in terms of folks waiting for all sex or…
- Heather Corinna
It’s absolutely normal for your partner to need some time to get fully aroused before intercourse is comfortable or even wanted. The vagina doesn’t really have a static state of “tightness” or “looseness.” When nothing is inside the vagina – or nothing is being introduced to it – the vaginal walls…
- Heather Corinna
If you always use condoms properly – and it sure sounds like you do – then it’s reasonable to presume that you have not had a risk of pregnancy. Condoms used alone – when they are used properly and consistently – are really very, very reliable forms of birth control and STI protection…
- Heather Corinna
No need to be embarrassed! Understand that the rectum is not a straight line, but is curved. It’s not only curved, it’s kind of curved twice: if the anatomy of your rectum from a side view was a map, we’d essentially go in from the anus, take a left, take a right, then go up again towards the right…
- Heather Corinna
Hey, there, Anon: glad we’ve continued being of help to you! Honestly, I don’t see any cause for concern here. Not only do I see no viable risks of pregnancy in this, just as you don’t, I also don’t see any reason to assume that you didn’t have a period this time around. My guess is you just have…
- David
Hey Anonymous, On a personal note, when I was growing up I was really, really freaked out about the way I was shaped. Enough so that I was almost panicky the first time anyone else saw it! It turned out I was way more worried than I needed to be. Turns out that normal erections bend in all different…
- Heather Corinna
Hey, Scott. Having one testicle has absolutely no physiological impact on sexual performance. Arousal, erection and orgasm are not reliant on the testicles in any way. As well, having your testicle removed, and but one remaining would not have impacted your sexual or general development, and your…
- Heather Corinna
Absolutely! Understand that orgasm isn’t really a genital event: rather, it’s a whole body event, one that takes place primarily in your nervous system and cardiovascular system, but which we feel effects of in our genitals as well, and which genital sex often causes. So, your heart rate goes up…
- Heather Corinna
Overall, body size doesn’t influence penis size. In other words, plenty of tall men have average-sized penises, like you, and plenty of short men have larger-than-average sized penises. Same goes for weight: penis size isn’t influenced by body mass, either. At the age of 20, it’s pretty likely that…