Hurmat-e-musaaharah between males

Q: Does hurmat mushaharah become established if a person hugs his father but he has strange feelings in his private part. He was scared during the event and did not get a full erection, however he is not sure about any minor movements that he did not notice. But he thinks that the minor movements (very small movements) were because of nervousness. He did not get any sexual thoughts. He was also a little bit scared during the event.