How do I know if my brother masturbates in our bathroom?

[ACC2015]

I share a bathroom with my brother and every time I see him go in there, he shuts the door to his room and my room and the door to the bathroom and uses it. He stays in there for at least an hour, if not longer. It really bothers me because I'm a girl and I share it with him. Have some respect for me! And when he goes in there I don't even hear him peeing, so I don't know what's going on. It's really bothering me because what if I use it right after him and there is semen on the toilet? That's what is scaring me. Please answer! Thanks.

[logicalguy]

I had to make an account to drop a few lines just for this.
These answers are pretty 1 sided to defend the masturbator. Sure he has the right to do his thing, but when he leaves so much evidence behind it becomes bothersome and very suspicious to the other brother like myself. Why? Seeing a mountain of tissues in the waste basket or un-flushed toilet with used tissues is even more disrespectful. I masturbate at times, but why make an effort to do it in a bathroom where you have limited time to enjoy yourself is beyond me.

Just stay in your damn room and lock the door reuse the wanking tissue ball it up and hide it for the next pleasure time. Taking trips to the bathroom is unnecessary and it using up the tissues even more quickly from those who actually use the bathroom. The new generation of teens just don't know how/where to masturbate properly.  A bathroom is meant for bathroom activities not sexual related desires

Everyone here keeps saying masturbating is a private matter, but again there are those who leave evidence behind and therefore is no longer private. I know my brother does it b/c he brings his cell phone with him everytime "He never flushes" and theres new used tissues in the waste basket. Its disgusting to see that especially from a family relative. Yeah its my family issue, but I felt the need to step in as its not disrespectful to be curious of the situation

[jemma116]

I do not think that it is disrespectful for a male to masturbate in any bathroom as long as the door is locked and he leaves the bathroom if someone else wishes to use it.

It is your mind going overboard - what does it matter what he is doing in the bathroom.  He is doing what he wants to do. He may be squeezing his zits for all you know.

You need to respect his privacy, and leave him alone and do not ask him what he is doing in the bathroom.  He may even be suffering from constipation.  
Some blokes like to sit on the loo reading a paper.

Mind your own business and be respectful to your brother and allow him his privacy.  You would not like it if he were prying to why you were taking so long in the bathroom!

[ACC2015]

Don't you think that is disrespectful?

[specialmom]

Talk to your parents.  We are strangers on the internet.  Can't help you with your home life dynamics.  good luck

[ACC2015]

I've gotten over that fact, I just think it's really disrespectful for a man to masturbate in a bathroom that he shares with a GIRL.

[specialmom]

I think you are letting your imagination get away from you.  This is a bit disrespectful to be kind of stalking your brother when he is exercising his right to use the bathroom.

Semen does not live by the way.  You can't get pregnant from semen on the toilet, the sink, the floor, underwear, hair dryer, curling iron, shampoo bottle, nope . . .   can not get pregnant from any of these.  

You must have vaginal sex with penis penetration within the vagina in order to get pregnant.  

good luck