I heard oxytocin was overrated. But then again, my friend was using it with his wife to try saving their marriage and his results may be skewed by that. Doesn't look that interesting in any event.
Cialis on the other hand is great stuff. Viagra gives me a headache and only lasts about a day. Cialis also gives me a stiff neck and a headache at more than 5mg, but honestly 5mg is enough to keep me hard as a diamond over the weekend. A breeze against the ankle is enough to send your dick through your pants if you're not careful. It's almost too much. I only take it with me if I'm drinking or a little bit when I'm cruising on ultra light doses and don't feel like a beast.
Always been a bit too scared to stay on PDE-5 inhibitors. At one point it felt like I needed them to get hard, but in hindsight it was probably something to do with my hormones than anything. Still enough to a scare to keep me using nothing but very, very low doses. Thankfully low doses go a long way.