I suppose its all dependant on the lady and fucking hard doesnt neccesarilly mean fucking 'deep',i can still grind inside my partner without going 'deep' and this drives her wild but in general i tend to use my hips to withhold from full penetration as she tend to find my gland constantly touching her cervix uncomfy.
I also think its important to mention positions and the actual shape of each penis and the compatibility.
I very much have a Arrow Penis, by that i mean no curve either way at all, so dependant on the way i hold my hips affect the penetrational effect for my partner.
We find Doggy a lot easier for ,than say, missionary, in this position i can get carried away to an extent but if her legs are raised slighty when im on top its a much more sensitive fuck that can go to deep ,(BTW this is where sex is best because she knows she struggles and trusts me not to go to deep and with contstant eye contact its very very erotic for her)
Making love is easy whatever your size of penis because that is heart felt and you understand each other ,it intimate, fucking with a large penis can sometimes become a problem .