If you can do the misses (in whatever entrance) without her waking up, you must be hung like an ant...
Well...you would think so, but I am hung slightly better than an Ant...probably better than "Adam and The Ants", put together in fact.
The good thing about the aforementioned, opportune time of attack, is that while in REM sleep, you lose much of your muscle tension. So that fact, combined with a steady, slippery approach to the whole thing, certainly allows either entrance to accommodate an above average member, with little disturbance to the sleep cycle.
However, you should remember, that sleep, is a constant change of sleep levels and you should time your attack to coincide with the REM stages and I don't mean in the "Everybody Hurts" kind of way.
Also, in the early stages, one should use the "traditional" entrance, meanwhile engaging in "digital" preparation of the tradesman's.
I think it was Baz Luhrman who said "S T R E T C H"
P.S. Can you imagine the levels of depravity that could be attained in an Over 18's Section? Wow! We can only hope.
Oh, I'm not permitted to say WOW! when being felated by a playmate, apparently. Learned that earlier.