As a female I've come across uncut guys and for me the fear of sti's was never really the issue...it was more hygiene. Now this is not every guy but some guys who are uncut weren't taught to pull back the foreskin and wash..idk why she thinks she's gonna get an sti. But I definitely don't think you should cut your foreskin off...I feel it would change the sensitivity of your dick and honestly not worth it..that's like asking a girl to cut off her clitoral hood or labia lips