I probably don't need to ask, but

[randomshinichi]

...when hearing my lesbian neighbours go all out, is it socially acceptable to knock on the door and ask to join in on the fun?

 

[SamMalone]

Are they hot? If so, details plz.

 

[r0cky]

I dont see any reason why it would not be socially acceptable. In fact I think it should be encouraged.

 

[Phat]

Why dont you go knock on your lesbian neighbors door and find out? That would make a better post than asking the forums permission to do it. Id like to hear how this goes if you do knock and ask. It sounds a little creepy though.

 

[randomshinichi]

I had a bad feeling, that's why I'm asking. Plus I live here. I'm leaning towards no, because nobody would want to be intruded upon during sex. Looks like I'll have to ask at some other time.

 

[SamMalone]

Ask indirectly.

 

[PlaysToWin]

Option A (Requires balls): Go ask them and see what happens. Report back.
Option B (Requires ball): Go ask them what they would respond were someone to ask them. Report back.
Option C (Requires no balls): Do nothing.

 

[Bible_Belt]

...when hearing my lesbian neighbours go all out, is it socially acceptable to knock on the door and ask to join in on the fun?

No, it's not. They get asked that a million times. If they wanted a dude with them, they would not have any trouble getting one.