Do relatives hold 2 sphinxters? Anus'?

Do relatives hold 2 sphinxters? Anus'?
yes, voluntary and involuntary. the involuntary will contract suddenly whenever something arrives quickly at that shutting of you (eg a fart) then relax if you permit it. there is other tone in that sphincter anyway (to hold everything in). Then in that is the voluntary sphincter which you can control at will (try it). Sometimes the internal involuntary one goes into spasm and cause problems - doctors cut it. This doesn't matter as you still enjoy the voluntary one to control things!
we have various.. pyloric, duodenal... etc
no - your question be directed at anal sphincters. There are many sphincters contained by the body - but only one anal one.
on the outside of the body, no...