How long do you wait until you have sex for the first time in a new relationship?

It depends on where both people are and how things feel. I have slept with a girl on the first date and we dated for awhile. I enjoyed grabbing her butt too much and freaked her out. Didn't realize she was self-conscious about her bottom.

I do not think it's too soon after 3 weeks. If you feel comfortable with each other, go ahead. It's better to know what you are getting into soon after you start dating someone you really like. You may find out that you don't like him so much after having sex with him.

I think, if it were me I would wait until my feelings ran really deepest.
which basically means a month and a half (if we're talking about how long I personally think).
the only reason I would wait as long is because you really want to get to know someone deeply before taking that step- and build up a high level of comfort with someone before taking it to that level. I don't think the number of dates equate much to how long you should wait.
Think about how you feel and how you think he feels (and what you two have discussed together)- if you really love him with all your heart and the relationship has reached that next level then you know its time.

but, my only advice is not to rush it. wait until you really really love him and a deep connection has been formed, otherwise once you take that step, if you realize it was a mistake/too early you can't take it back. Take it slow and wait until you feel very ready.

I don't think there's an alloted time in which you should have sex when it comes to dating. You'll know when the time is right. You can't really go based on a time frame because 3 weeks with one person they could be taking things extremely slow and just starting kissing, and 3 weeks with another person, they could really be into one another and have gotten to the point where they are comfortable with the other person. I had sex with my boyfriend after two weeks. I just felt like I was ready at that point.

I can say that I honestly don't have a time frame. I was with a guy for 2 years before I had sex with him and I don't regret waiting that long. My current relationship was much sooner. I knew him very well and had been seeing him, although not exclusive, for over 2 years. When we finally started dating because we couldn't handle just being friends anymore, we had sex probably within the first 3 weeks. I know that from an outsiders view that may seem to soon, but again, I don't regret having sex with him when I did. We both wanted it and it felt "right". So, to make things clear, I don't think it should matter what other people think is "easy" or not. If sex is something you are both comfortable doing, even at an early stage in a relationship, then by all means have it. I would think by this point he is aware that you aren't "easy" and talking to him about how you feel can always help.