He'd talked to a few women himself. Menelaus was all about grande gestures and making sure he did things right. He wanted to be sure he made her as comfortable as possible. He may have even talked to Clytemnestra on knowing what not to do. He wasn't knew to sexual encounters, but he was new to a wife, and a partner. This was different.
He kissed her hand again, moving his chair a little closer so he closed the small gap between them. "My goal, my Queen is to never disappoint you." He meant that.