Oh please! PLEEEEEEEEAAAAAAAAASSSSSSEEEEEEEEE! MAKE A SEQUEL! In which Lance uses the products and Lotor comes across him afterwards, and Allura has mild jealousy conniptions.

YES, YES, YES! Round of applause! I always knew Lance would be jealous of Lotor's luscious lucks. XD

Lance would do that. But honestly I don't think Lotor would have that impressive an array of hair care products. He is just naturally fabulous.

This is actually pretty realistic! I find it plausible and in-character. The last scene could specify that Lotor is angry about the loss of his hair products in particular; it does not really say anything about his reaction to that, and sounds as though other things were taken or rearranged as well, so it's not clear that he noticed.