Is it permissible for a man to touch his penis during intercourse?

There is no harm for a man in touching his penis, whether during intercourse with his wife or otherwise; because it is a part of him. However, it is disliked to touch it with the right hand during urination or defecation as a form of purification (tanzīhan), not prohibition (tahriman). It is better to keep the right hand pure from touching it absolutely.