I suppose the OP could turn to her husband and say "oi, you controlling bastard, dont you DARE suggest I wear a dress".. then she really might have a bigger reason to post on Relationships..
If my husband said to me "you should wear a dress now and again, I get fed up of seeing you in trousers", I would probably tell him that I dont really like dresses, can never find any that I feel suit me or that I feel comfortable in, and he would either accept that, or he might disagree and tell me that he thinks I look great in a certain dress.
Not all dresses are the same, and there are plenty that would minimise a bigger tummy and stop the wearer looking like a barrell.
I regularly tell my husband that I wish he would wear trousers more often rather than jeans, but it falls on deaf ears anyway.
I just do not, and never will understand the posters who try to convince people that their partners are being controlling or abusive or have no respect for them, simply because the partner has passed a comment that goes against the ethos of feminism.
Many successful relationships work because the two people in them are not trying to be politically correct, tread on eggshells, and can speak their minds to each other.
The OP has posted a reasonable question, and plenty on this thread are, as per usual, trying to create a relationship breakdown where there isnt one.