Happened once by accident. Wife was due her period but used to get extremely horny at that time of the month and wanted it so who am I to deny it lol. Was using a toy on her, I noticed she'd started and she put a stop to it, I'd have carried on tho. I'd give it a proper shot if she wanted to, but the wife doesn't feel comfortable with it.
I personally am not comfortable with it... Which really really sucks because I get very horny. However, I still take care of him. He shouldn't have to suffer.