shower

Intimacy between spouses

Q:

1. Is is necessary to change the bedsheet every time after having sex? As some fluids may come on it.

2. Is is possible for wife to masturbate his husband's penis?

3. What is the best treatment for premature ejaculation and erectile dysfunction? Any ayurvedic drinks or any thing according to Islam?

4. Is it permissible for both of us to take shower together ?

Washing the feet for the second time after having a shower

Q: Whenever I have a shower and after I wash my feet and step out to dry myself and dress myself then when I go back to wipe the base of the shower cubicle where you stand, I find there are small hairs and little fluff. Does this mean I have to wash my feet again and the areas I've stepped on? Or are these hairs pure and I can just ignore it?