A man, thought to be naked and breathing heavily, allegedly followed two people home in East Molesey.
One of the women posted on a forum, detailing how the pair heard breathing as they walked along Wolsey Road, before turning to see the man was carrying out an indecent act.
Surrey Police confirmed a report had been received of a man committing an act of indecent exposure in the early hours of Friday, June 26.
A spokesman said: "Officers are investigating an allegation that a man was seen in Wolsey Road at approximately 0.20am committing the offence."
If you witnessed the incident, or have any information which could assist the investigation, call Surrey Police on 101, quoting incident reference P15164058.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here