~ I have been thinking on this and so I approach with my answers:
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2D can always look how you want them to look in any way
True and its dependant on the current design of said 2D, as they change over the years in style and creation.
Their appearance can be changed to the way ~ YOU WISH IT ~ through PaintShop/Photoshop programs and be adjusted to suit your means and desires.
3D can give you real warmth of a human body
Though 3D is amazing and human contact is needed, 2D can render the same ~ "effect" ~ thus the creation of the Daku and by the means of adult toys which add to the stimulation of said effect.
3D can give you the feeling somebody will always wait for you
You used ~ "feeling" ~ as in sensation and so I will place 2D in the same cata, as I stated before in my Devotion manifesto, 2D can render the same effect.
It's limited and dependant on the person and how they precede such action.
2D doesn't need to shave their body hair since they have none
I agree.... saves on the cost of beauty aides.
3D can hold your hand being outside of the house
(for me) this rather difficult, though not really,
As I must roll around in the wheelchair by my own means of propelling, so this does not phase me nor is a requirement for me.
Besides ~ she can always - *ride* - on my lap, thus giving her a reason to wrap her arms my neck as we speed by the rest! :3 :P
~ (plus) she would NEVER have to walk or get her feet/shoes dirty.
NO ONE pushes me while I am in the chair, which is "why" removed the handlebars, which were a annoyance, and give people - *an excuse* - to start pushing me.
3D can give birth to your children
I have no need to add more children to my rl lineage, I have a son, and had a girl who was - taken away at the same time - as was my rl first waifu.
Enough said.
3D can suprise you with gifts
My 2D is always surprising me with the BEST gift, and that is illuminating and stimulating my imagination. and to me that's a gift.
2D can't throw things at you if you leave them
2D would not ever have to worry about such things, because I will never leave her.
3D on the other hand, have a tendency to become overly emomelodramatic over the smallest of things.
Which gets on my nerves...
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2D won't be only yours always
I disagree with this, as my 2D waifu is ALWAYS there for me, and she never wavers in her devotion for me.
Granted ~ this devotion is possibly a delusion on my part, but its still a devotion that I believe in.
She may be a (everyone else's) in some way or another, it doesn't matter, its the same with 3D, the 3D counterpart is always coveted in some way or aspect as well, though - (MOST) - of the time, its a hidden covet.
3D love to have mood switches for wierd reasons
See my explanation ^above concerning ~ emomelodramatic's
2D may be a trap
True...
2D merchadingse of your waifu cost lots of money
Being that I am retired, I can enjoy all the perfections of waifu merchandise, because I (actually) shop around for the BEST deals and never buy (off the cuff or by mere joining the masses).
IF I am going to spend money on my 2D, trust me it will be well-worth the expense. ~ (just as I did with my 3D counterparts)
2D will never have true feelings for you
I disagree, because one never really knows the (mysteries) that can beheld within a 2D characterization.
One never knows if (some day) a animu episode may come to life.