http://www.minoritynurse.com/article/men-nursing
> studies have shown that male student nurses experience additional barriers and discrimination, such as: lack of information and support from guidance counselors; lack of sufficient role models; unequal clinical opportunities and requirements; isolation; poor instruction on the appropriate use of touch; and a lack of teaching strategies appropriate to male learning needs.
See also the section headline "Why Men Do Not Pursue Nursing" which goes into more detail in the difficulties they face.
The most common negative complaint I've heard is that, despite being nurses, they often get cast as "muscle", holding down patients and the like, which is both dangerous (struggling patients, needlestick, etc.) and also pretty antithetical to the reasons most nurses chose their profession.
http://lesswrong.com/lw/ih/absence_of_evidence_is_evidence_o...
Please think of what it would mean for your argument to be true before clicking through to the above link.
For both teaching and nursing, there is an acute concern about the lack of men, as role models for boys in school, and in basically any healthcare profession besides "Doctor".
It should be noted however that unlike the common experience of women in CS, men in nursing frequently report that despite being a distinct minority, their opinions and ideas are often given more weight than they should be because of their gender.