On the receiving end of anal, it feels better to get it all the way in! Not half way. Half way in is half assed and it's like "wtf are you doing right now! Fuck my ass properly". Deep and fast is the way to make it feel amazing. If this dude was fucking me in the ass I wouldn't stand for this half way sort of shit. You can go half way when you are a few thrusts in but after that there's no excuse to just hover at half way the whole time. The dude is an amateur.