STD's How worried are you and what precautions do/will you take?

[tlover]

A serious subject here for a change as there been a lot of talk lately on the forum about STD's.

I used to take very little sexual precautions a few years back, i once went with a girl who after we broke up told me she had hepatitis and i should get myself checked out.
Turns out i was ok, I'm not sure if she was just trying to wind me up for the break up.
Anyway with me wanting to have an experience with a tgirl ive been thinking about what precautions i should take, i would like to go with a tgirl who is not a working girl but I'm more than likely going to go to a working girl as I'm not really after a relationship.

Part of what i really want to experience as in some of my fantasies is for her to fuck my ass and cum inside me, also to suck her cock and have her cum in my mouth.
Now i wouldn't have her uncovered cock in my ass and certainly wouldn't have her cum in my ass in reality, this would only happen if i was in a long term relationship with her and i knew for sure she was clear of anything afrter tests (not easy) unfortuntly i dont think it would be the same with a covered cock.
As for the sucking bit, if ive got no cuts ulcers etc in my mouth i will suck her cock, (i think sucking her cock with a condom on would be like eating a mars bar with the wrapper on) i dont think i would let her cum in my mouth though, i would probbly let her cum on my chest or something.

My question is regarding ladyboys only, how worried are you about catching something and what precautions do/will you take?