For the OP... Your question was how to accept being in a stinky diaper....
First of all, you have shared that you are DL but not necessarily "AB". Okay, I can understand that. Before I ever associated with being AB, I certainly associated with being DL. I did so for many years, but eventually realized the association of being DL connected with a further desire to be more babylike, including use of pacifiers, baby bottles, etc. It was then that I understood that the connection of wearing a diaper was more about being my own little self and not just because of how much I wanted to wear diapers.
--But as far as the stinky diaper goes, I would encourage you to look at your own interests of why you may like wearing diapers. Is is just the feel, or is it the association with being little in some way. I think that if you do associate it with being little, there is a much greater appreciation as for the wearing of diapers and using them.
In that sense, the actual "use" of the diaper becomes a part of the experience of why you are wearing them in the first place. Just as the sensation of just wearing a diaper is certainly comfortable, when one associates the experience of using a diaper with the attachment to it, the sounds, wetness, and so forth can become part of the attachment to wearing.
If it isn't something you are accustomed to, then it might take a little bit of looking into why you like diapers and ultimately a bit of regression.
Having said that, I agree with what others have said.
This certainly has a place in the privacy of one's home or other circumstance, not in public. You have suggested nothing to the contrary, so I am not going to belabor this point. I agree with what others have said that being stinky in public should not be done. Period... There certainly is a negative connotation about this, and it is by far one of the greater reasons why people who hear about ABDLism and do not share in these interests look upon this interest with distain or disgust. Our society places diapers whether just wet or messy as being gross and something to be avoided.
--But that is not what I understand your question to be. From your original and subsequent posts, it seems you get all that and you question is just that you want to know how can you feel more comfortable and accept messing a diaper and the associated sensations (including smell) because this is something you and your partner want to explore.
Pause... Okay, before I proceed, I guess this might be like a commercial announcement, but please, PLEASE, make sure that you take adequate protection against diaper rash and the other woes that could beset you if you are in either a wet or messy diaper for any period of time. Diaper rash is no laughing matter and even could prove to be a serious condition if an infection sets in.
But as far as your original question, I think that with a little bit of imagination; acknowledgement of the connection that exists in being DL and actually using them; investigation on if or how that relates to the feelings you enjoy of wearing diapers; and exploring a bit of being AB, it will most likely do the trick. It can become part of the experience with your partner of wearing diapers and the association of being little and whether it is part of BDSM or not, it is something that is enjoyable rather than distained.
Final note: If on the other hand this is not something that you want to do, then don't do it!!! Your partner should not expect you to do something you are not comfortable with. Its certainly not something for everyone and if you aren't comfortable with it, then you truly need to share that with her and you shouldn't be forced into doing it if you don't want to, even if you are into BDSM.
But unless I have misunderstood, that isn't your question. You seem sincere in your question, so I am going to encourage you to explore those things that you and your partner have a common interest in and perhaps looking at ways to regress and associate more with being little. Doing so, you might find that part of you that is not just DL, but AB. And in so doing messing a diaper might actually become as much or more of the experience as wearing it alone if that is what you and your partner decide.
:detective3