The body suit was bought to be formfitting for her comfort but also the material was so thin that he knew it couldn't obscure anything. It was the trade off for the ability to feel through it so well and Alex had no complaints.
He was very slow and careful, his attention on her; not just her body but reactions and feelings. Despite how some people saw Alex he was exceptionally sensitive and he knew that Rogue had experienced some pretty horrible things in the intimacy department. His fingers trailed over her lightly, exploring and appreciating her but also focused on helping her feel close, connected, and adored. It was a long time of soft touching and exploring before a move was made for her shorts but it eventually was and he looked right into her eyes as he did.