I used to find it weird, but not so much anymore. I've come to the conclusion that most guys have really skinny legs and usually gain more weight in their abdominal region than anywhere else, which sucks for me since I'm a pear and it's kind of awkward that way. I still feel self-conscious since girls are "supposed" to be skinnier, but it's manageable.
No I have seen a cute couple like that though I would hate it if the guy was shorter and smaller than me. I see many guys that are too small for me because I am 5'6 and I am big boned with broad shoulders --- so not fair!