Size really shouldn't be an issue. If it is girth you are worried about, as DBL D stated it is muscles and they will stretch. If it is length, hopefully he is experienced enough to not try and go too deep. The best advice I can offer is to become comfortable with him. Make sure you can talk easily with him, and be sure to talk even during foreplay. That way he can ask you what feels good, and you can tell him if he needs to adjust something without feeling nervous.
He is going to want to please you, not cause you discomfort in anyway. If he goes too deep, or thrust too hard tell him to ease up. You will both enjoy it a lot more. Good luck with your first "big Unit". It really can be great. facelick
mrs hmr
