This may be a silly question, but do MOB or MOG dresses need to be ordered ahead of time like wedding gowns and bridesmaids dresses? FMIL will be in town in May for FI's and my graduation and we were all going to go out to look at dresses (and to order the bridesmaids dresses for the December wedding). If they got dresses from David's, would they take them home right off the rack? I guess I'm asking too because I want to go out with FI's grandmother to look for her dress and I don't know when the ask her to go. Sorry if this doesn't make sense and thanks in advance for the help!