Hi Robin
As males, we have learned, sometimes the hard way, that many women take exception to men passing comments on their appearance.
On the other hand, women seem to take pride in any favourable comment made by another woman.
Physical changes such as you have described are chemically controlled, and you have little say in the way they occur.
On the other hand, mental changes in attitude are entirely yours to bring about and control.
IMHO, part of the transition process ought to be about rethinking your previous attitudes, pre-conceptions and prejudices concerning women.
I think you ought to have been pleased to note and accept the good comment your colleague made.
If you have nice legs, flaunt them!