Ok, the meaning of this dream is, I believe, in how you felt about what was going on. You do not mention this, so I will go by the hard facts, and you will get to fill in the blanks with
what emotion the situations/actions gave you.
You are travelling through barren land - nothing grows/lives, survival is hard. With a danger behind you.
I'd say a "you are changing (travelling); it is needed (danger), but difficult (desert)" or something to that extent.
You get to a house - this is you in its current form. In it women lie in beds for you to sleep with. Now, why is that - in the dream? Is this a service to the women, is this a task that will get you forward in you flight plan, is this because they are inviting and you cannot help yourself, is this because it is just sexy as all hell, is this because you feel you should.. or what other 'reason' there might be in the set up.
How do you feel about it? Accomplished, confused, shameful, lustful...?
Someone sees you - could indicate that you would be alittle ashamed of this, that you are 'caught'. In that case, I definitely believe it has to do with a change in attitudes towards the feminine and the masculine (in yourself and out in the world).
You are to clean yourself - from the act (shameful or not); but you would have to 'change habits' - use another shampoo.
But decide against that
You just shower, not clean (shampoo).
Two other females shower; on the stereotypical 'friendzone woman' talking about her boyfriend to you. The other just listening and showering with you, no sex. So that is possible too. There is that female human that seems to 'just' be human to you.
The men are headed left (progressive...?) but you are taking 'the King's road' to the right, Game of Thrones' old-style masculine (and feminine) way...?
I think the theme is genderroles /feminity & masculinity - in you and in how you meet and treat others. Something is going on, changing, chasing you.
Maybe?
If this rings true, mind that I don't believe in dreams that predict the future so which road you eventually take, is definitely still to be determined
Good luck