First of all... Why would any woman try to advise this guy about masturbaton!
self-gratification once a day by a 27 year old male is perfectly normal. For a 27 year old even one who is having regular sex with a woman, daily self-gratification is still within the range of "normal". How many 27 year old men have pre-mature ejaculation problems with their wife/girlfriend?
Want to have prostate problems later in life...don't have regular ejaculations.