Русско-английский словарь пословиц и поговорок
ПАРУ БОЯТЬСЯ В БАНЮ НЕ ХОДИТЬ
Do not undertake a job if you are afraid of the difficulties it involves. See Волков бояться - в лес не ходить (B)
Cf:If you can't stand the heat, get out of the kitchen (Am.). If you can't stand the heat, stay out of the kitchen (Am.,Br.)