Unknown sketches made by who ?

Real pencil sketches but made by what artist ? Any idea's ? Thanks

 

I think the top one says Je t'aime, probably made for his lover.
I hope the last picture is not his perception of his lover in an angry mood.

 

I don't think the angry cat-dog-horse-chicken-mermaid sketch is done by the same hand that did the nudes, but I also don't think it matters (because I think @Any Jewelry is correct in her read of the "signature").

 

by a beginner art student

 

No idea but maybe some others will come in ?

 

Not signed and a pretty generic style, these are two of many sketches that may never be identified. They are nice, sweet even, but not by a top artist.