So I'm a little over 6 inches in girth and my gf experiences quite a bit of soreness after sex. We have sex, and usually have to wait 2-3 days before we can have sex again. Is there anything she or I can be doing to prevent this? We both find it fairly annoying, and I don't like hurting her. But we spend quite a bit of time warming up with foreplay, and we always use lubricant, but nothing seems to really help. Any thoughts?