Can a five year old watch a girls only swimming class (if I am unable to make other arrangements for him) together with his mother as they sit and watch the duration of the lesson while his sister has a swimming lesson. If assur, can the rav please give reference in MB. Many thanks
According to a number of poskim even a small boy should not watch the women swimming. According to Chazon Ish it is from when the child can remember what he sees, even at an age less than 3. However R’ S.Z. Auerbach quoted in Halichos Bas Yisroel 7-19 ftnt. 39 that one preferable should be careful from age 3. Regarding the Mishna Berura, he talks about which age a girl must dress modestly- from age three, however I am not aware of a place that he addresses the issue of until what age a little boy may see immodesty dressed women.
Om Ani Choma pg. 20, Teshuvos V’hanhagos 1-137, Children In Halacha pg. 31.