Yeah Mr. Average! I think that you should explain to her that you feel really sad that she isn’t feeling you inside her when having sex and you would feel sad if she won’t allow you to do something to make you feel like you’re providing for her in a more satisfying way. Say to her that you feel that it is a mans duty to find ways to make women enjoy sex as much as is possible and that at the moment you feel that she needs to give you a chance to find some alternatives to bring into your sex lifes to make you feel like your providing for her, which makes you feel like a man that can be prowd of himself. Explain to her that its something you really care about and and you feel that you should be given the chance to do something about it.
If she starts to listen with some understanding of how you feel, then make inroads into talking about the alternatives that you would bring into your sex lives. Don’t talk about wanting to give her a big dildo, until you can tell that she is listening to you with an understanding of what it would do for you if she obliged.
If she doesn’t understand where you’re coming from the first time, don’t talk about dildos or any other alternatives.
Talk to her a few days later and see if you can make her understand. Keep trying to talk to her on different occasions with lots of love in your voice, until she starts not dissagreeing and understands what it would do for you. Then when you have made that break through you can either talk to her about a dildos or vibrators or you can simply bring one home without discussing what your alternatives actually entail.
If you do get her to exept yor efforts, even if she’s not enthusiastic to say the least, bring something that doesn’t scare her off. Don’t get one that is made to look like a penis. Get one that is girl friendly that looks like a girly toy. Pink, or orange, without the penis looking features.ie veins, and head. Best if its just long, thick, without the features of the penis and a girly colour.
If she accepts, you need to give her some time alone with it, to get to know her own body. She would feel far too self concious if you were in her company the first few times she uses it. Which would ruin the experience for her and turn her off doing it again. Give her some time, but make it clear that you are giving her time to get to know how to use it and in a week or so you will join her when she uses it. That will stop her with trying to get away with not using it.
When she learns that it can bring her much better stimulation than she ever expected, it will make her far more enthusiastic, but like you said before, she has know experiense of big dick or toys so how would she know what it can do for her until she actualy recieves it inside her.
You could just start off with buying her a tiny little vibrator that is just for a womans clitoris. This will definitly make her cum like never before and it won’t be very off putting for her as all she has to do is rest it on top of her clit without any insertion into her vagina.
I hope it works out for you! I hope I gave you some help!