Are this altars on the map teleporters? When yes how the duck do i activate them?
if you're talking about the pussy portal, you can activate them by reaching the desert, or the cheat code: imma lazy sack, that cheat unlock everything, portals, buildings, gates, locations, the Alraune at level 3, she no longer give you money but it doesn't really mater if you have all the buildings and she can no longer milk your nephelym, but knock her up, sleep and you'll have a daughter with her, she'll replace her mother for milking your nephelym.
If you're talking about the penis located next to Death, only one can be activated at a time, the last one activated is a returning point after diying. Example if you jump too high from the desert, you splat yourself and if you activated the penis next to the death character, you'll return to that point alive and having sex with death.
I hope I answer your question, if not, well explain better, or provide a picture