<human>: Summarize the given text in a few sentences.

Provocative title, I know. Basically, I need some data to settle an argument between me and my boyfriend. 

I found out that while I was away at school, my boyfriend had masturbated while lying in my bed. That's totally fine. Then I found out that his method of doing so was to jerk off until he came, come, and then wipe the results off my sheets after the fact. And it's not the first time he's done so in my bed. I was a little miffed about that.

I had been under the impression that it at least fairly common for guys to pre-prepare by having some tissues nearby, or a sock, or something. He says no, that it's typical practice for guys to just deal with the inevitable afterwards, and semen-soaked sheets are no big deal. That's what he always does at home.

He also said that since semen typically gets on the sheets after we have sex anyways, and since I've never had a problem with that, I shouldn't have a problem with this. I think those are two completely different things - no easy cleanup solution is required for semen resulting from our activities together. It's something we kind of did together, so it's fine if it gets on my sheets. Lone jerking semen is a different story.

Opinions?
<bot>: I'm pissed off that my boyfriend jerks off in my bed while I'm away and soils the sheets with impunity.